In your last picture in the 1st group is the tuner CAPACITOR (finned unit that rotates). This is an AIR GAP cap so any dust, dirt, junk, etc. between the fins will wreak havoc with tuning. Blow it out with AIR (preferably dry) and DO NOT get DeOxit NEAR IT. Cover it with a plastic bag if you are DeOxit'ing any controls near it. After all the cleaning is done, run down to Home Depot and get can of CRC "QD" ELECTRICAL CONTACT CLEANER. This is a NON RESIDUE contact cleaner and ok for cleaning out Tuner Caps. Set it on it's side tuner side down and turn the tuner so the fins are NOT MESHED. FLOOD the fins with the CRC, making sure you get in between each and every fin. Let dry for a couple hours in the sun. Fire it up and check out the tuner. It should be good to go. If it's off frequency let it dry some more for a couple of days. Even the CRC can change the tuning temporarily while it dries. I've had tuners running 15 minutes afterwards and with no ill effects. But as dirty as that one is I'd flood the fins, getting them clean, and let them sit in the sun a couple days.