If you are using a rba, you can usually tell if its a problem with the bottle o-ring or bottle being too tight. Just screw the cap off the rba so you can see and sqounk the bottle. If the
juice drains back into the bottle immediately, then its probably not an o-ring problem and maybe not a problem at all. If the juice lingers in the drain hole, then your bottle is not able to breathe properly.
I speak from experience because I'm really lazy about cleaning my REO's and they eventually get finicky in the manner you describe.
Not saying thats what caused your problem, just......sayin.
