Super single tires need resealed

I have a 923a2 that developed 3 tires that leak down over the winter. It was fine in the summer, but once the cold hit they all 3 go pretty flat within a week or two. I unhooked the CTIS on those tires to rule out something on that side and they drop just as quick. I have the correct O rings and rebuilt kits for the valve stems. I did a search and didn't come up with anything concrete as far as bead sealer on the beads or around the O ring. Yes or no? Anything else that would work better or no need for anything? I have watched the videos Wes made and he makes it look easy to get them dismounted. Still not looking forward to this though!

If its only an o ring just pull the old one out. New one on. Stretch it a few times. Use some tire soap to hold it in place or vasoline. It will try to pop off if it's the 0r220tg o ring. Then slide the outer ring on and start pattern tighten. Replace your valve stem seal while you are in there

Moisture in the tire was on the o rings. Got cold and cracked and leaked

I have new valve stem seals to go in when I break each one down. Figured it would be pretty stupid not to change them since I am in there