I am making wine for the first time. Been brewing beer for about 3 years.
Yesterday I racked my wine. There was some residue at the bottom after the initial rinse. I put in some warm water and Oxyclean. That nearly always works for beer stuff. Used my carboy cleaner attached to a cordless drill. Still it isn't budging. Figured it needed to soak longer, or perhaps the carboy cleaner didn't make contact with the bottom of the carboy.
Soaked it overnight again in Oxyclean. Got my old carboy brush out and tried that. No dice.
Can one of y'all identify the residue and give me cleaning advice? Clearly my beer experience isn't transferring. Thanks