Leaderboard

Elbow grease and a scrubby sponge.

Uhhh... ok. I've never seen a threaded pressure switch with a gasket. Unless you consider teflon tape a gasket. I have never had one of those heaters apart so can't be sure, but I'm betting a new pressure switch will do the trick. Something like this might work. https://pool-spa-supplies.com/caldera-spas-pressure-switch-2006-to-current-kit-ps-hohs-06-73995-3331?utm_source=google_shopping&gclid=Cj0KCQjwv5uKBhD6ARIsAGv9a-x2az-UccJqgp_jVnjiZsGKzYIR-x-pnP0Tf0DlwBKEuUDY9jPio70aApacEALw_wcB

If the housing is not cracked, I would think a new O-ring or new gasket might fix the leak. If a gasket, and not available, I might try a thin film of RTV on each side of the existing gasket, or cut a new gasket from rubberized sheet gasket from the auto parts store.

Should be a o-ring. Gently remove pressure switch and check for worn o-ring. Switch should unscrew

Unscrew and remove the battery - this is the one rubber seal you can definitely remove. Then to avoid damaging the other rubber seal any further by completely disassembling, I personally would grab a small tupperware bin and fill with desiccant packets (everyone hoards those free reusable desiccant packets they find packed with electronics and other stuff, right?? lol) - place the remote in this bin and leave it for a week or longer to suck out all the moisture from the remote. Re-install the battery, and try re-pairing. I don't know if this will work - it's likely the digitizer layer of the screen has been shorted out - but there's a small chance drying it out completely will help.