Quick answer: Glass is the highest-leverage cleaning item in a holiday let: guests experience it as "light" and "freshness" without ever naming it, and review phrases like "spotless" and "bright" cluster around properties that keep it perfect. The between-stays checklist: shower screen (every changeover), mirrors and patio doors (every changeover), interior window faces (weekly), exterior glass (monthly, more if coastal). The economics favour automation hard — a robot cleaner works unattended while you turn the linen, which is the one hour when time is money.
Ask any superhost what guests actually notice and the answers converge: light, smell, and whether anything anywhere is grubby. Windows are two of the three. A guest who arrives to sun streaming through spotless glass onto a view has already drafted a five-star review in their head — and a guest who clocks a smeared shower screen starts auditing everything else.
Why glass punches above its weight in reviews
Guests rarely write "the windows were clean" — they write "so bright", "sparkling", "immaculate", "the view!". Dirty glass gets named directly: "smeary windows" is a review phrase that exists. The asymmetry is the point: clean glass earns vague glow, dirty glass earns specific criticism. And your listing photos have the same physics — light sells bookings, and glass is where light enters.
The changeover checklist (every single stay)
- Shower screen — the most-inspected glass in the property. Squeegee after final clean; limescale rescue guide here for hard-water areas.
- Bathroom and bedroom mirrors — fingerprints and toothpaste flecks; dry microfibre or the streak-free mirror method.
- Patio/bifold doors, inside face — hand and nose prints at two heights (adults and kids/dogs). This is the "wow view" pane; it earns 3 minutes.
- Glass tables and splashbacks — vinegar mist, dry wipe.
The weekly and monthly layers
Weekly (or every 2–3 changeovers): all interior window faces in living spaces; balcony glass inside face if you have one (balustrade guide).
Monthly: exterior glass all round. Coastal lets: fortnightly — salt haze rebuilds fast and sea-view properties live on their view (the salt-spray method). Rural lets after pollen season, roadside lets more often (traffic film).
The economics: automate the slowest job
Changeover hours are the most expensive hours in hosting — yours or your cleaner's. Exterior windows are the changeover-killer: slow, weather-dependent, and ladder-y exactly when you're busiest. The fix is the same one hotels found: separate glass from the turnaround. A CleanBot R1 cleans a pane unattended while the linen gets turned — place it, anchor the rope, carry on working — and it does the upstairs outsides without a ladder, which for a two-storey cottage is the difference between "monthly, easily" and "when the window cleaner next comes". Against UK window-cleaning round prices for a whole property, a robot typically pays for itself inside a season — and it's a business expense for a let.
FAQ
What glass do guests complain about most?
Shower screens (limescale), then patio doors (smears against the view), then "dark" rooms — which is often just grimy glass eating the daylight.
Should window cleaning be in my cleaner's scope?
Inside faces and shower screen: yes, every changeover. Exteriors: separate schedule (robot or round) — putting ladder work inside a 3-hour changeover is how corners get cut.
Do photos really improve after window cleaning?
Re-shoot your hero shots the day after a full glass clean, in morning light, and compare. Brighter rooms, truer view colours, no haze bloom around the windows — it's the cheapest listing-photo upgrade there is.
Five-star reviews are made of details guests feel but can't name. Spotless glass is the biggest one — and the CleanBot R1 makes it a standing item that costs you no changeover time at all.