There are a few reasons why your Roomba might not be charging. One possibility is that the charging cable is not properly inserted into the charging port on the robot. Another possibility is that the battery is damaged or the charging port on the robot is defective. If you think the problem might be the charging cable, try using a different charging cable to see if that solves the issue. If you think the problem might be the battery, you can try replacing Battery. If you are still having trouble getting your Roomba to charge, then contact with irobot or explore more about this issue from here https://homespoiler.com/roomba-not-charging/