On a skylight cleaning robot in 2026, squeegee blades typically last 400 to 800 cleaning hours, brush sets 600 to 1,200 hours and filters 150 to 400 hours depending on water hardness. Replacing them on time costs less than the streaks and scratches you get by stretching them.
Consumables are where a good machine quietly turns bad. A worn blade leaves a water film; that film dries into spots; the spots are then blamed on the robot. Most “the machine is rubbish” complaints are really a blade that should have been swapped three weeks earlier.
How long do squeegee blades last?
Blade life depends on two things: glass coating and cleaning frequency. On plain tempered glass, 600 to 800 hours is realistic. On coated or tinted glass, expect closer to 400, because the softer surface drags more and the blade edges round off faster. Check the edge monthly under light; a blade that no longer bites fully will leave a thin film behind.
When should you replace the brush set?
Brushes wear by flattening, not by disappearing. Once the bristles lose their spring, the brush stops lifting dust and starts smearing it. On dusty industrial sites, 600 hours is a fair ceiling; in a clean atrium, 1,000 to 1,200 is possible. Rotate brushes between positions if your machine allows it, and you get more even wear.
Why do filters fail faster on some sites?
Hard water is the killer. Sites with 250+ mg/L of calcium carbonate will clog membranes and leave spotting even with a fresh blade. There, filter life can drop to 150 hours. Soft-water sites in coastal areas with low mineral content may run 400 hours between changes. Test your water first; the number decides your consumable budget.
| Part | Typical life | 2026 cost | Fails by |
|---|---|---|---|
| Squeegee blade | 400-800 h | €60-€120 each | Rounding, streaking |
| Brush set | 600-1,200 h | €150-€350 | Bristle flattening |
| Filter cartridge | 150-400 h | €40-€90 | Mineral clogging |
What does a full consumable kit cost?
Budget €200 to €400 a year for a clean-site atrium machine and €500 to €900 for a dusty or hard-water industrial roof. That range is small next to the machine price, which is why skipping it makes no sense. Keep one spare blade, one brush set and two filters on site; waiting for a delivery during a cleaning window wastes far more than the parts cost.
What is the most common maintenance mistake?
Cleaning the filter less often than the blade. Teams see the blade because it is right at the glass, so they swap it. The filter sits out of sight and clogs quietly, and then the spots come back. Log both on the same schedule and check them together.
A second mistake is storing the machine wet. Damp brushes and blades grow mould and degrade faster between jobs. Dry them before the machine goes back in the case. Replacement parts and a service schedule are available through the contact page.
How do you tell a worn blade from a dirty filter?
The two faults look similar — both leave streaks — but they differ in pattern. A worn blade leaves uniform thin lines across the whole pane. A clogged filter leaves cloudy patches and dries to spots, often heavier near the edges where water pools. Diagnose the pattern before swapping parts, or you replace the wrong one.
Does brush choice affect how fast blades wear?
Yes. A stiff brush scrubs harder and loads the squeegee behind it, so blades round off faster. Soft brushes are kinder to both the glass and the blade, at the cost of a slower pass on heavy soil. Match the brush to the dirt, not to the fastest possible clean.
How should you store the machine between jobs?
Dry the blades, the brush and the tank. Damp parts grow mould and the rubber hardens into a curved set that never seals properly again. A machine stored wet can need a full blade change after a single idle month, which is money thrown away for nothing.
How do you keep a consumable log that actually helps?
Record the date, the hours run since the last change, and the water hardness if you know it. After a few cycles a pattern appears: blades wearing faster in summer, filters clogging faster on hard-water sites. That log turns guessing into a schedule, and a schedule keeps glass streak-free without over-spending on parts.
When is it cheaper to replace than to clean?
Rarely, but it happens. A blade or brush is cheap next to the cost of a poor clean and a complaint. A hardened, misshapen blade that no longer seals will not be saved by cleaning; replace it. The parts are the smallest line in the budget and the fastest to fix, so treat them as disposable by design.
Does glass coating change the whole schedule?
It changes the consumable side most. Coated glass wears blades faster, so shorten the blade interval and lengthen nothing else. Filters depend on water, not coating, so leave that schedule alone. Reading each part against its own driver is what keeps the plan accurate instead of averaging everything into one guess.
Key Takeaways
- Blades last 400-800 hours, brushes 600-1,200, filters 150-400 depending on water.
- Coated glass wears blades faster than plain tempered glass.
- Hard water at 250+ mg/L can halve filter life — test before budgeting.
- Keep spares on site; a clogged filter causes more spotting complaints than a worn blade.