After any cleaning, the original lubricant is washed out of the pot or switch, leaving dry, hi friction surfaces that will wear down fairly quickly. Use either DeOxit brand FADERLUBE(F5) or CRC 226 Electronics lubricant. Both work well to lubricate the electrical contact points and the other wear points in switches and pots.
Regular exercise of all pots, and switches is recommended. As Mark said a few times in the past (I'm paraphrasing here. I added the Bold to Marks quote )" If it goes in/out, up/down, or Round and round, it needs to be cleaned"(or words to that effect!) and lubricated. I would add semi annually exercising them briskly to scrub the crud some. 20-30 cycles each should be sufficient. If that doesn't work, then escalate the solution (DeOxit D-5 or D-100 in the dropper tube), then DeOxit Faderlube (F-5). You can go so far as to use DeOxit Gold (G-5) which has a protectant vs a lubricant as the primary chemical. But the GOLD isn't required unless you have gold contacts. And it starts getting expensive at that point.