My Tabac soap, about half used, has recently started acting weirdly. But only when I'm not looking. After shaving I rinse off the soap, put the lid on, and set it on the shelf. It looks normal when I put it away. The next morning, when I open it, there is a peak of soap about 3/4 inch tall in the middle of the soap. I'm thinking poltergeists. But maybe there is a logical explanation. Has anyone else encountered this? (Has everyone else encountered this and I'm the last one?) Can someone tell me what is happening?