Help preventing adult bed wetting!?!?

My husband and I have been married 2 yrs now. I knew coming into the relationship that he had a bed wetting problem as a child (nightly occurrence) and on occasions still wet the bed as an adult. I didn't think it was a big deal because as a child, I too had a bed wetting issue. Although, I outgrew it in my teen years. Here lately it's been a nightly occurrence and I'm starting to get annoyed with it. I've asked him to go to the doctor but he simply refuses. I've also suggested setting an alarm, fewer drinks at night etc but he doesn't want to try anything. He even got mad when I wanted to place a protective sheet on the bed. I don't know what to do anymore and nothing I seem to suggest is good enough. I'm trying to be supportive but I'm also tired of having to wake up every night to clean the bed up. I know it's mean but I'm starting to think that he is just being lazy and not caring. If his phone rings in the middle of the night, he will wake to answer it or if the kids are crying he'll go to them so it isn't necessarily that he is a deep sleeper. I desperately need help and answers!!!