Peavey 5150 EVH amp head: Noisy Potentiometer fix?

I own a Peavey 5150 EVH amp head, an early model purchased way back in
1991 or 1992.

The amp suffers from a couple noisy pots.

Can I apply some type of contact cleaner to the potentiometers to eliminate the noise (which will allow me to avoid having to remove them from the PC?

Or are these potentiometers sealed (thus derailing my plan to apply a fix without having to remove/replace them)

It's usually pretty obvious where to spray the cleaner (usually into the slot where the 3 terminals leave the body of the pot) but some Peavey pots look like they're sealed. These are the ones with the squarish profile and plastic body. On these, you usually can blow a little Caig
D-5 cleaner into the corners if you place the nozzle right up against the corner between the phenolic wafer and the body. Work the pot back and forth a half-dozen times. Clean up your overspray with a Q-tip.

Do I smell a job for...WD40...?!?
(Dunh Dunh DAAAAA...!)

Just kidding. Absolutely DO NOT USE WD40!

Caig Pro Gold is the choice here. If, in fact, there's opening to spray it in.
If not then a replacement is in order. Aarrgh..

I thought those could be cleaned with caig deoxit. I have done it before. I don't recall exactly what the looked like, but I did not remove them to clean them.

I would suggest you have an amp tech do that, and also do an adjustable bias mod for the amp. That amp has a HUGE improvement in tone when an adjustable bias in installed and set properly. The amp runs so cold otherwise it sounds horrible on the "clean" channel.
Also, Shuguang tubes sound great in it and are very inexpensive. You really have not heard the amp until you do this - no kidding. Makes all the clean to moderately distorted tones improve dramatically. The pot and jack cleaning should be thrown in for the normal bench fee.