fill a spray bottle with a couple of teaspoons of bleach and 500ml water and spray everything down and leave it sit for 15 minutes. Wipe it clean. The bleach should kill all of the nasties. I use bleach to clean the lines as well, but there are products specifically for this on the market as well. I mix up about 1/4 cup bleach in a keg that needs sanitising as well, seal it, shake it, leave it sit for 10-15 minutes, then run the bleach solution out through the tap and lines. Then I flush the keg with aots of water, until the bleach smell is completely gone, fill it with clear water and run that entire keg of water through the tap and lines, leaving a pressurized, sanitised keg, and clean lines and taps.