If he uses pads stay with them ! My 2 are way older and very trained but there's always days when they just gotta go
I use a washable large pad with a disposable one on top. My oldest is very very good about getting up in the night and using it while my youngest and smaller one will hold it till we get up (if one has an accident though it's usually her and usually only during storms)
I'd rather be able to throw something away than worry about having my place smell. Everyone who's been here always tells me how nice my place always smells - can't even tell I have dogs - (course they SEE them) but at least I know the carpet is clear - plus I keep reed diffusers in each room
I've been to peoples homes that reek and granted some can't help it but I sure don't want that problem...once it starts it's very hard to control cause the scent is already there and they think it's ok to do again