For about the last 13 months PdP has been one of my most reliable and soothing soaps to use. Hoewever, the last two times that I used it, it made my face very irritated and red. Something that its never done. To the contrary, it always soothed. It also smells a little funny. Hard to pinpoint but it smells a little like lead pencil. Has the soap gone bad and should I throw it out? I don't have the original tin, can anyone confirm whether it has the 12M insignia on it? - Thanks