The schedule most owners need
iRobot publishes a real maintenance table for every Roomba series — this isn’t folklore, it’s their care-frequency documentation, and we pulled every current table on 2026-08-05. For the i and j Series (the most common Roombas in service), the two tables are identical:
| Part | Clean | Replace |
|---|---|---|
| Multi-surface rubber brushes | Weekly (2×/week with pets) | Every 6–12 months |
| Filter | Weekly (2×/week with pets) | Every 2 months |
| Front caster wheel | Every 2 weeks | Every 12 months |
| Edge-sweeping brush | Monthly | (no interval published) |
| Charging contacts | Monthly | — |
| Cliff sensors | Monthly | — |
| Bin | After each use | — |
The legacy table for the 400–900 series is essentially the same schedule — bristle brushes and AeroForce extractors both get weekly cleaning and 6–12 month replacement, and the 800/900 add full-bin sensors to the every-2-weeks list.
The pet rule is consistent across every series: brushes and filters go from once to twice a week; nothing else changes. iRobot’s warning for skipping it is blunt: “Excessive build-up of hair in the brushes can permanently damage Roomba.”
Where the newer series differ
If you own something newer than an i or j, don’t reuse the old intervals — iRobot changed them:
- s Series: the corner brush (its version of the side brush) gets a published replacement interval of every 3 months — the shortest side-brush interval iRobot prints anywhere. The caster wheel is at the rear on this series; same clean-every-2-weeks, replace-every-12-months.
- Roomba Max 700 Series: edge-sweeping brush replaced every 3–6 months; the brush cover/frame gets its own line — inspect every 6 months, replace if worn; and there’s a rear caster cleaned every 4 weeks (weekly with a pet).
- Roomba Plus 500 (505) and Essentials: the filter interval stretches to every 3–6 months, versus 2 months on i/j/s. Mopping pads on the combo models: replace every 3–6 months.
- Combo 10 Max: brushes are cleaned monthly rather than weekly, replacement still 6–12 months — and iRobot specifically says do not wash its filter.
The caster wheel: the one everyone forgets
The little front wheel has its own official procedure, and skipping it has a cost iRobot names directly: “A Front Caster Wheel that is clogged with hair and debris could result in floor damage.” The drill, every 2 weeks: pull the caster firmly out of the robot, clear the well, pop the wheel out of its housing and strip the hair wound around the axle, wipe, reinstall.
Replace it every 12 months or as needed — and iRobot’s one published wear signal is that the wheel starts falling out of its housing. Two design caveats from the same article: on the Roomba Mini and 100/1000 series the axle doesn’t come apart, and on the Roomba Essential the caster can’t be removed at all — you clean it in place.
Cleaning the rubber brushes properly
The part most people miss is under the caps. iRobot’s procedure: release the brush-cage tab, remove both brushes, then remove the end caps and clear the hair packed underneath them and around the metal axles — that’s where the wrap that stalls a brush actually lives. Check the vacuum path behind the brushes is clear, then refit each brush to its matching peg shape. The pass/fail test is simple: spin the brushes after cleaning — if they don’t rotate freely, iRobot says that’s your cue to replace them.
Drive wheels: a procedure, but no schedule
Here’s the honest gap in the official schedule: the drive wheels appear in no maintenance table at all. No cleaning interval, no replacement interval — iRobot treats them as replace-on-failure. There is an official DIY path when one dies: on modular e, i, and j Series robots and the Combo 10 Max, the wheel module swaps out with a screwdriver — one flat-head screw on the edge brush, five on the bottom cover, two on the module. One trap to check before ordering: iRobot notes that “not all i-series models are modular. Newer versions with battery doors cannot have wheel modules replaced.”
What the parts cost
Official irobot.com list prices, checked 2026-08-05:
- Front caster wheel: $9.99 (one SKU fits nearly all Roombas; s Series rear caster is $8.99)
- Dual rubber brushes: $39.99 (e/i/j/Combo 10 Max) or $45.99 (s Series)
- Filter 3-packs: $36.99 (e/i/j and Combo j-series) or $19.99 (105/Essential); s Series single filter $13.99
- Edge-sweeping brush 3-pack: $19.99; s Series corner brush 3-pack $22.99
- Replenishment kits: $66.99 (e/i/j), $85.99 (s Series), $39.99 (100 Series)
iRobot runs a standing bundle discount — 10% off two participating items, 15% off three, 20% off four — so a caster wheel, brushes, and filters ordered together beat three separate orders.
What iRobot doesn’t publish
Beyond the drive-wheel silence: there’s no replacement interval for the i/j edge-sweeping brush (the newer series get 3–6 months, the older tables just say clean monthly), and no measurable wear criteria anywhere — no tread depth, no brush diameter. The only official wear signals are qualitative: brushes that won’t spin freely, a caster that falls out of its housing. Set a calendar from the tables above, and let the annual caster swap and the 2-month filter be the two you actually keep — they’re the cheapest parts on the list and the ones the schedule leans on hardest.