2 articles on wet grass — guides, reviews and comparisons from the team that measures real lawns.
Tips & Maintenance Can Robot Mowers Mow in the Rain? (And Should They?) Robot mowers survive rain — your turf is the casualty. Rain delay settings, dew windows, the standing-water rule, and how wet grass wrecks cut quality. 
Customer Installs "Paying Someone to Ruin My Lawn": Villanova Robot Mower Install He fertilized and overseeded — and every week his lawn crew's heavy mowers undid it. Ruts, torn turf, shredded seed. Why this Villanova, PA homeowner went robotic. 