To add to this thread, my Touch recently became very sluggish to respond to the IR remote. The same remote worked fine on the Radio and Boom. After reading this thread I decided to order a new power supply and that indeed remedied the problem. The remote now works as well as it did originally. Was prepared to do the IR sensor replacement and made notes based on this thread highlighting the part number and location of the sensor. At this point it will not be necessary, but appreciate the information contributed by the forum members.