I am 18 years old, and for as long as I can remember my pee stream is really strong. I am just wondering why it is so strong, it doesn't seem normal.
If you can't find a better solution, you can use a plastic shower curtain as a rubber sheet. They are pretty large and can cover enough of the bed to be a solution. I think they're cheaper than special sheets.
Call or go to a hospital supply store and they'll be able to set you up.
Any department store should have them in the bedding section- Try Wal-Mart.
Look around on the internet for special need stores. Or maybe her Doctor can recommend something. Im sorry to hear about the alzheimers, my grandpa had it. I never meat him, he died before I was born. I'll keep you and your mom in my prayers.
He is completely using you. Just politely say that he's been asking a little too much lately, and that you need your phone. You could suggest that he get his own phone, so he won't have to keep using yours. You could even get him a prepaid phone to use, that he can fill whenever he needs more minutes. Be straightforward with him. He needs to understand that he can't keep interrupting your life and using your phone, racking up your phone bill.