Wet chin

Hi, a couple of months ago I noticed that my chinchilla had a wet chin, I took her to the vet and a couple of her back teeth had overgrown so the vet filed them down and her chin dried up and she went back to normal.

I checked on her this morning and her chin is soaking wet again, she's drinking quite a lot and will only eat raisins as they are soft.

Could this be teeth problems again after they were only filed down a couple of months ago?

My vet is closed tomorrow for New Years so I won't be able to get there until Friday, is there anything I can do in the meantime.

Thanks