Denial is tough to deal with. If it were my wife trying to tell me something that I wanted to ignore, I would think that a direct approach would be best. Ideas like just putting pads and disposal bags where he can see them and leaving it as a strong hint would not work for me - I'd be quite angry, in fact, over what I'd see as passive-aggressive behavior and an unwillingness to talk with me about issues. Having a discussion after your husband is already angry with you is probably not the best way to bring him around to your point of view.
With the direct approach, you also risk making him angry. That's a pretty normal reaction when people are forced to confront issues that they would rather ignore. But for me, if rather deal with anger over a situation than anger over refusing to communicate.
One final thought is that you say you feel like he should want to be clean for you. Firstly, if this is your expectation, have you told him this? I have no idea what my wife expects or wants from me unless she tells me - maybe your husband is different from me, but I don't do the whole thing and inuendo thing very well. Aldi, is it about his problem, or is it about yours? Your concerns are certainly valid, but he may be more receptive to hearing about how the problem is hiring him than about how it's hurting you. Does he know that his pants are sometimes wet? Does he know that he probably smells like urine sometimes when he leaves the house? Most people are more motivated to solve problems of this sort that impact them than they are too solve problems that impact someone else.
So much depends on the nature of your marriage and your communication styles. I can tell you what would work for my wife and me, but it may not be right for you. So please take my comments as one possible route, but understand that that route might not be the right one for you.