Originally Posted by PoseidonCichlid
LOL, tried and failed. Was going to use a scouring pad next (without detergent of course) but was worried about scratching the glass. Are you saying go for it?
I would try a razor blade if that doesn't work.
I assume you are not going to use steel wool or a brass pad, because they definitely will scratch the glass. One of those "ScotchBrite" green scrubbing pads will be fine.