With utt, I am not sure about putting it in the freezer.
The fridge may be a better option. If you post within the AMS forum, you may have a better answer.
I'd be scared it would expand (its mostly water) and break the bottle.
i checked it this morning, and it was sludgy.
I wouldn't freeze it if your using it this winter unless it is expired.
no its not expired. ill just stick it in the fridge then.