Super Contact Spray, I have many years the T6 Oszillin contact and tuner spray and did this also used for car contacts. The contact spray is almost used everywhere, in my opinion, I also have this last used hi-fi for our stereo, since after a power failure, the time, no transmitter function and timer periods to provide a decreased since this device to 99% only on the remote control was used and therefore the whole adjustment potentiometers as well as touch keys were dusty and oxidized. I have the unit disassembled, cleaned with brush and vacuum cleaner sprayed all possible contact surfaces and allowed to dry. Hi-Fi device mounted again, tried and lo and behold, to the annoyance of the Hi-Fi equipment manufacturers, the plant is working again 100% perfect! ! ! The delivery time was unfortunately a week longer than specified, but well, it was the Christmas holidays and the turn of the year because it can happen even once. Nevertheless, like again.