I think that will end up as a dead chalice. You can, however, lay it on the counter and use a syringe and nondiluted peroxide if you're careful not to get any on the tissue. The very edge of the tissue may be ok, but try to keep in on the disk. Let it sit for a minute then rinse in tank water. I did this with my WM chalice with no issues. The edges of the chalice are typically a little elevated from the disk anyway. I can show you when I come over tomorrow.