Ok, so I thought I had another carboy cap but I guess I only have one and it's on my fermenting Saison. I brewed tonight and I'm just waiting for it to cool and just noticed this. What should I do? I'm thinking of using the carboy cap I have on the Saison since it's pretty much done and will be bottled in a few days and putting some sanitized foil over it until tomorrow. Will that work? Thanks!!