If the Roomba is only 6 months old, contact iRobot
. It is under warranty unless it was a refurb.! Call customer service and let them know when and where you purchased. Ebay
is the wrong answer and will void the warranty - hopefully you bought it from a recognized dealer! If it came from Costco, just take it in for an exchange for a new system! They have your info in their system.
: Explain the problem and they will probably have you send in the bare bones Roomba and the charging base and charger for replacement. It's not too expensive and you won't have to get mechanical.