How to Clean the Front Wheel of a Roomba Discovery

Step 9 Free the bumper

The front bumper has a cable that is attached on the inside center. Separate it from its receptacle with a pair of small needle nose pilers. Next, separate the inside and outside sections of the bumper by starting at each side and prying them apart. The 4210 model has its handle on the bumper, so to actually remove the bumper, you'll need to pull up on the main cover just a little. With the main cover lose, place Roomba on it's wheels and carefully work the bump up and away.