The glass was described as perfect, but of course, I know, buyer beware. Appears cleanable. The mold, I hope, has not etched the glass. Appears to be around the edges of the top inner large element. Not the cemented smaller elements. The people at Grimes offered a good price for cleaning. I may well send it to them. On the other hand, it may be worth pulling out the spanners and disassembling to clean.
The seller refunded me $100. So at $250, I feel a bit better. A bit. Live and learn