Josko

Quick Facts

Brand at a Glance

Product Range

Why This System

Step 1 of 2: Manufacturer Recommendations

Official Care Guidance

Glass

• ✓Use only mild cleaning products - heavily diluted washing-up liquid or soapy water (Seifenlaugen).
• ✓Use only soft cleaning cloths (weiche Putztücher) - no abrasive materials.
• ✓Never use abrasive, corrosive, or solvent-based cleaning products.
• ✓No high-pressure or steam-cleaning equipment.
• ✕No razor blades, steel wool, or scouring pads.

Timber Interior (Platin, Amber)

• ✓Mild cleaning products only - heavily diluted washing-up liquid or soapy water.
• ✓Soft cotton cloths only - Josko specifies cotton, not microfibre, for wood surfaces.
• ✕Do not allow water to pool on timber - wipe dry promptly after cleaning.
• ✓Interior wood requires no additional care beyond regular cleaning.
• ✓If wood shows signs of wear, contact your Josko Vertriebspartner for specialist advice.

Aluminium Exterior - Warranty Critical

• ✓Soft cloth and mild pH-neutral cleaning solution.
• ✓Rinse with clean water - soap residue attracts dirt and dulls powder-coated aluminium.
• ✓For heavily soiled or chalked surfaces: use the Innotec Service Set 4.
• ✓Professional cleaners must follow GRM guidelines (Güterichtlinien für die Fassadenreinigung).
• ✕Warranty applies only to aluminium demonstrably cleaned 2× per year with approved products. Written documentation and purchase receipts are required.

Hardware

• ✓Annual inspection and lubrication. Remove old grease residue with a dry cloth before applying new.
• ✓Approved: ROTO Beschläge-Fett, Haftöl spray (AX NR. 26-soma-0365), Haftschmierstoff TecLine Beko.
• ✓Open and close the window several times after lubricating to distribute the grease evenly.
• ✕Never use silicone spray - Josko warns explicitly. It evaporates too quickly and fails on concealed hardware.

Seals and Drainage

• ✓Inspect rubber seals (Dichtungen) during every cleaning - cracking, hardening, gaps.
• ✓Use the leaf test: close on a sheet of paper. If it pulls out easily, the seal may need attention.
• ✓Clear drainage openings (Entwässerungsöffnungen) at every glass cleaning.
• ✓On the ONE system, insect screens run within the drainage shaft - clear these channels regardless.

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 Josko installation.

1. 1

   Agitation

   Dip the microfibre T-bar into soap water and wet both sides. Apply with overlapping strokes - you are loosening dirt, dissolving fingerprints and oils so the squeegee can shave them away cleanly.

   If dirt is not fully dissolved, it transports under the rubber as a smear. Agitation matters more than the squeegee itself. On Josko's flush design the T-bar glides without catching. On large ONE aluminium panels, cover the full surface in overlapping passes before squeegeeing.

2. 2

   Detail the frame edge before squeegeeing

   Wipe the frame edges where glass meets frame with a damp cotton rag. This removes dust the squeegee rubber cannot reach. Skip this and frame dirt runs onto the clean glass mid-stroke.

   On timber/aluminium models, be careful with soap water near the wood interior. Wipe any contact promptly. Cotton - not microfibre.

3. 3

   The squeegee turns

   Side to side: horizontal passes. Tilt the squeegee slightly to direct water spillover to one side only. Wipe the rubber dry after each line. Overlap into the next line down.

   Top to bottom: vertical passes. Same tilt principle. Wipe dry between lines.

   The J tune (continuous motion): one smooth movement from top to bottom with no stops. Rotate the wrist at each end to reverse direction without lifting. The AR Training Tool builds this exact motion.

   For ONE aluminium with the 5 cm frame profile, the squeegee runs closer to the glass edge. For fixed glazing beyond arm's reach, attach the squeegee to an extension pole at roughly 45° to the glass.

4. 4

   Final edge detailing

   Press your finger into a clean corner of the cotton rag and remove pooled soap water from the edge where glass meets frame seal. Rotate the rag for each pass. Replace every few windows.

   The quality of the squeegee turn determines how much detailing you need. A confident, consistent turn means less cleanup.

5. 5

   Never clean in direct sunlight

   Soap water evaporates before you can squeegee it when the glass is warm - streaks before you have started. Clean in the morning, evening, or on overcast days. Matters especially on Josko's large-format glazing.

Pro Tips

• ★ Keep a cleaning log for aluminium. Date, product, and the purchase receipt. The warranty depends on it - not on the cleaning itself, but on the proof.
• ★ Use cotton cloths on timber. Microfibre marks the wood finish. Keep two cloths - one for wood, one for aluminium - to avoid cross-contamination.
• ★ Never silicone spray on hardware. It is the single most common - and most damaging - Josko maintenance mistake.

What NOT To Do

Bundle Kits and Tool Recommendations

Cleaning Frequency

Glass: 2× per year minimum (4× per year in urban environments, near busy roads, or high-pollution areas.). Aluminium exterior: 2× per year (Warranty requirement, not a recommendation. More frequently in exposed locations.). Timber interior: 2× per year (Mild cleaning solution and cotton cloths.). Hardware: 1× per year (Priority lubrication points: Ecklager (corner bearing) and Axerarm (scissor bearing).). Drainage channels: Every clean (Clear at every glass cleaning. On ONE, insect screens share the drainage shaft.). Seal inspection: 1× per year (Or whenever you notice drafts, increased noise, or difficulty closing.)

Frequently Asked Questions

Field Notes

“Use cotton cloths on timber interior surfaces only - not microfibre. Microfibre can mark the wood finish. Keep two separate cloths - one for wood, one for aluminium - to avoid cross-contamination. Glass: minimum twice per year - four times in urban environments, near busy roads, or high-pollution areas. Aluminium exterior: at least twice per year - warranty requirement, not a recommendation. Hardware: annual lubrication. Priority points are the Ecklager (corner bearing) and Axerarm (scissor bearing). On larch exteriors, expect natural silvering. This is not damage and should not be 'cleaned away' aggressively.”

Justin Orloff