Problems & Troubleshooting Q: The robot is not running very smoothly? A: If the cleaning cloth is too dirty, replace it with a clean one.There may be gaps in the glass or types of stickers on the glass surface.The cleaning wheel is getting loose, completely lock it in place. Q: Why sometimes window cleaning robot cannot detect the top of the window in the automatic mode? A: Because of slipping.ust press the STOP key to pause the robot, then choose the RIGHT or LEFT key instead.Too much water sprayed, you need to replace the cleaning cloth. Q: When the robot starts, why the robot keep alarming? A: There probably the following reasons:The cleaning cloth is way too dirty.The glass or glass stickers are of high friction, it’s unsuitable for use.The window cleaner robot cloth humidity is not enough and the glass is too slippery. Q: The has not finished the cleaning work, how come the window cleaner robot ended the process? A: Press the RIGHT key or LIFT to redo any unfinished work. Q: The glass has arcuate marks after cleaning? A: Clean the glass surface with a dry cleaning cloth when do the first cleaning.Spray a little water or detergent (don’t too much) on the cleaning cloth, replace the cloth and keep it dry and clean, then start the job again.