Robot lawnmower leaves clumps of grass and the cut surface looks ragged.

Safety first: Switch the mower OFF and wear gloves.

• Inspect blade edges: Check for nicks, rounded edges, or rust. Dull blades tear grass instead of cutting cleanly.
• Replace blades: Install new genuine Stihl iMOW blades and screws, following the orientation shown in the manual.
• Avoid obstacles: Adjust the perimeter wire to keep the mower away from gravel, stones, and tree roots that damage blades.

Regular blade replacement (often every 1–3 months depending on use) maintains cut quality and reduces strain on the motor.