If the problem is going to continue and you don't want to change mattresses, put a thick vinyl mattress sack on it after cleaning and airing as well as you can. Then, use a mattress pad--get two so they can be washed. Perhaps also add an additional rubber pad under the sheet if there is a commonly used spot.
More.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.