What the Fuck is this?

[Rjs725]

Did you use high heat to warm the brew? Sometimes you can "burn" it and that's what you see at the bottom.

Or, this could be using the glassware over and over again. Eventually when heat sterilizing if you leave any iso prop alcohol on the surface of the glassware prior to heating it, it will burn on and usually has to be scratched off...

 

[FockU]

Ive had a similar instance happen to me not long ago. I had let some Residual BB set inside of a syringe from my first batch earlier in the night. There was barely anything in the syringe just what was left from squirting out a syringe full. It had eaten away at the rubber stopper in the syringe and when it was time for my next squirt of BB about an hour later I didn't see it until it was in the new batch. I went ahead and heated it up just to see if that experimental batch would hold and not crash. Well some of the rubber pieces had dissolved so there was no way I was going to use it on myself. The syringe was a Terumo brand.

Sold it?

 

[Abuckeye]

God no it went down the drain. I make for just myself and I would never even think of selling to others. I like my life and I'm not gonna end up in prison for short term money. Matter of fact I'm never brewing ever again!! Ever