Primus Group — Window Cleaning Guide

Quick Facts

Brand at a Glance

Product Range

Why This System

Step 1 of 2: Manufacturer Recommendations

Official Care Guidance

Glass

• ✓Pre-rinse glass surfaces with clean water before applying cleaning solution in dusty or high-mineral-deposit conditions.
• ✓Clean south-facing glass in the morning or late afternoon to avoid solution evaporation in direct midday summer sun.
• ✓pH-neutral glass cleaner in warm water. Microfibre T-bar and professional squeegee.
• ✓Edge wipe in rebate groove before final squeegee pull.

Frames

• ✓pH-neutral solvent-free PVC cleaner on damp cloth. Do not apply to hot PVC in direct sun - move to shaded face first.
• ✓Use soft tools only. Hot PVC surface in summer marks more easily than cooler PVC.
• ✓Clear all sash drainage slots at every clean.
• ✓Check and clear the cill junction of mineral deposits that accumulate faster in the Balkan climate.

Hardware

• ✓Lubricate all moving hardware twice yearly in Bulgarian climate conditions: spring and autumn.
• ✓Use a lubricant with a wide operating temperature range - standard light machine oil may thin excessively in summer peak temperatures.
• ✓Wipe hardware with damp cloth and dry at every clean. Mineral dust in hardware mechanisms is abrasive.

Step 2 of 2: The Orloffs Protocol

The Orloffs Protocol

Pro Tools

My daily tool list. This is what I carry to every job.

Follow these steps in order. Each one builds on the last. This is the same sequence I use on every Primus Group installation.

1. 1

   Preparation -- before any water touches the glass

   Fill the bucket with at least 10 litres of water. Add soap for cleaning power -- enough to cut through environmental deposits, not so much you are fighting foam.

   Before touching the glass, brush down the surface to remove loose dust, spiderwebs, and debris. Any grit left on the glass during the wash phase risks scratching during agitation.

   Check the aluminium frame condition before you start. Confirm which cleaning product is safe for that surface before opening any bottle.

   Cover anything below the windows that cannot be moved.

2. 2

   Agitation -- apply and work the solution

   Dip the microfiber T-bar completely into the soap water, both sides. Remove excess water with your hand so it does not drip. Apply the solution across the entire glass surface with overlapping passes.

   The goal is to fully dissolve and release every deposit from the glass surface. Anything not released during agitation gets transported across the glass by the squeegee as a smear.

   For stubborn spots -- insect marks, salt residue, environmental deposits -- re-apply soap water and allow it to soak for a full minute before agitating again. Use more soap water, not more pressure.

   For panels above arm reach: attach the T-bar to an extension pole. Work in sections -- top first, then middle, then bottom -- keeping each section wet until you squeegee it.

   Rinse the T-bar cover regularly during the job. A dirty applicator causes microscopic scratches that accumulate over time.

3. 3

   Detail the frame edge before squeegeeing

   Use your 100% cotton towelling rag, finger pressed into the fabric, to work into every junction and remove pooled soap water before the squeegee pass.

   This prevents drips running down onto already-cleaned areas during squeegeeing and keeps soap water out of drainage channels.

   On Primus Group aluminium frames, pay particular attention to the bottom edge where glass meets the frame sill -- water pooled here runs into drainage openings and leaves residue over time.

4. 4

   The squeegee

   Tilt the squeegee at a slight angle so soap water spills from one side of the channel only -- not both. If the rubber is jumping or squeaking, either the rubber is not lubricated enough or the glass surface has warmed.

   Cutting in: start with the rubber blade making first contact on a dry edge of the glass.

   Side to side: horizontal passes across the panel. Works well on wide sections. Top to bottom: vertical passes down the panel. Works well on tall narrow sections.

   The J tune: one smooth unbroken motion top to bottom, wrist rotating at each end to reverse without lifting the rubber. The most efficient method on larger panels -- but it requires training before applying it to premium glass.

   Wipe the rubber dry after every pass. Overlap each stroke by 2-3 cm.

5. 5

   Final edge detailing

   After squeegeeing, there is always a residual line of water along the bottom edge and at the panel sides. Take a dry cotton rag, fold to a clean corner, and detail these edges in one smooth pass.

   On Primus Group frames, the bottom edge where glass meets the sill requires the most careful attention. Water left here runs into drainage and leaves residue that affects the next clean.

   Rotate the rag to a clean section after every pass. If the rag picks up grit at any point, replace it immediately.

6. 6

   Frame wipe and hardware check

   On Primus Group powder-coated aluminium frames: use pH-neutral cleaner only, never abrasive pads or steel wool. Dry immediately after wiping.

   Check that all drainage openings are clear and unobstructed. Water must be able to flow freely -- a blocked channel leads to accumulation that affects seal performance over time.

   Operate every opening window through its full range. Stiff handles or resistance at locking points indicate hardware that needs lubrication. Flag it to the owner rather than forcing it.

Pro Tips

• ★ Timing is the most important variable in Bulgarian window cleaning. The same technique that produces perfect results at 8am on a south-facing window produces streaks and residue at 1pm on the same window.
• ★ Pre-rinsing is not a step that can be skipped in dusty south-eastern European conditions. The alternative is dragging mineral grit across the glass surface with every T-bar pass.
• ★ Hot PVC in Bulgarian summer is noticeably softer than cooled PVC in autumn. If you clean the south-facing elevation in September you will find the PVC frames much more forgiving than in July.
• ★ Twice-yearly hardware lubrication is a minimum standard in the Balkan climate, not a luxury. Lubricant applied in spring is significantly degraded by September in high-temperature conditions.
• ★ Apartment balcony doors in Bulgarian cities are the highest-use windows in any residential building. They are opened multiple times daily in all seasons and are the first hardware to deteriorate without service.
• ★ Mineral bloom on south-facing glass that has been left for more than 6 weeks in Bulgarian summer conditions may need a dedicated mineral stain remover rather than standard glass cleaner. Apply according to product instructions, rinse thoroughly, and complete with standard cleaning technique.
• ★ White PVC frames on south-facing Bulgarian elevations yellow faster than north-facing frames due to UV exposure. This differential yellowing is normal and accelerates if cleaning products with bleach or oxidising agents are ever used.

What NOT To Do

Bundle Kits and Tool Recommendations

Cleaning Frequency

Glass: 3 to 4x per year (South-facing elevations in Bulgarian climate benefit from quarterly cleaning to prevent mineral bloom bonding.). Frames: Same visit as glass (More frequent light cleaning is better for PVC in high-UV, high-temperature environments.). Drainage slots: Every clean (Standard maintenance.). Hardware lubrication: Twice per year (Spring and autumn. The Bulgarian temperature range degrades annual lubrication too fast for single-application service.)

Frequently Asked Questions

Field Notes

“South-eastern European PVC window cleaning requires timing awareness that is not part of standard northern European window cleaning training. The sun position and glass surface temperature are real variables, not theoretical ones. Primus Group windows represent the standard mid-range Bulgarian residential product. The material and construction are consistent with central European mid-range products - the climate context is what changes the maintenance approach. Twice-yearly hardware service is the most underperformed maintenance action on Bulgarian residential windows. The temperature range makes annual lubrication genuinely insufficient to protect the mechanism through the full year.”

Justin Orloff