Others reviewing this training collar had complaints regarding battery life. That has not been our finding - indeed training aid works well for several days. We do take the collar off over night of course. A great way to train the dog to stay away from areas or stop getting into mischief - without constantly telling the dog to stop - or no. We're we bought it. By the way, the batteries were reportedly some tone expensive - but if you buy them through Amazon, they are reasonably priced.
I haven't tried any detergent yet but the cleaner works well with warm water. The little bridge keeps the wrist watch works above the level of water allowing cleaning of the wrist band. We always heed the warnings on what not to put in the cleaner - so we have not had problems.