I fully sympathize as I spent months shouting at my husband to get his ears checked as he was constantly saying what, eh, can’t hear. Eventually he went and he has 40% hearing loss in one ear and 30% loss in his other. He was then given one to try out and he said he couldn’t believe the difference. Oh, we are in Spain so we had to pay, he had the choice of three, €500, €1000 or €1300. Being the mean bugger he is he asked for the cheapest, so I told him to get the middle one as was afraid the cheap one would be no good. He is only getting the one for now.
So, problem solved you might think. But no, he says he keeps forgetting to put it in. I went berserk and told him we are not wasting our money if he isn’t going to use it, so time will tell.
You would think they would love to have their hearing restored! I would refuse point blank to go out anywhere with him unless he has his hearing aid in and refuse to have anyone in the house while he is there. Sometimes you need a bit of tough love to make them sit up and notice. Good luck!