I like Kontak myself....and yes they do work...I use a pipe cleaner and you will be amazed at the amount of dirt / junk at the end of the cleaner when your done
Are contact treatments worth the money?
I have been reading some of the claims regarding the benefits of applying contact paste, liquids, etc. to all my connections. It sounds appealing but would like to know your experience with such products. Prices range from $35 to hundreds.