Hi Cade,

looks like you're on to something here,

I usually wash once using about 60 ltr for a batch of 1000ltrs, but my brew is kept at 65 deg at all times. after I drain the soap/water the fuel is absolutely crystal clear, even once cold. I might try to heat that to 180 deg and see what happens.

I have a glass 2 ltr Erlenmeyer flask and give that shot. That would rule out contamination of a metal pans.

Does anyone think it would be a issue using the flask at that temperature?

Thanks guys