Coffee roaster question (glass, vinegar, boiling, beans)

[bagster]

I have a coffee bean roaster, and the part that holds the beans is glass. After many roasting sessions, the glass has turned black and I can't see how the beans are coming along. Anyone know how to clean the stain off of the glass? I've tried soap and hot water to no avail.

[Dogmama50]

Possibly CLR or if you can get your hand in there try a Magic Eraser.

[elnina]

First clean with degreaser, then try solution of bleach&water, rinse well, add little vinegar to last rinse.

[Wilson513]

Straight tri-sodium phosphate and boiling water. Let it soak. If you can't find TSP, just use ****& Span.