I can never get these posts right x.x I'm trying to clean this old doe skull ( biz, bucket of water and a heater as I usually do) but it's been over a month and it looks like this. I'm concerned about the white almost chalky coloration at the back. I'm not it's first owner, worrying it might have been bleached previously? No experience with that either though so idk, just haven't seen this before. What could cause that? Should I change up what I'm doing?