Husband's Hygiene Issues

My husband has always had hygiene issues. He has OCD and autism so showering is difficult because going from hot to cold overwhelms him. He also will only shower if nobody is home and has a ritual where he makes sure every single door and window is locked and has to do that 5x in order before he can shower. That one is more related to trauma. He didn't live the best childhood which contributes to his hygiene issues because as a child he used to try to be as dirty as possible to get certain people to leave him alone so hes grown comfortable with being dirty. He's clearly has not been showing the last few weeks and I dont want to hurt his feelings. I've always struggled with how to bring this up nicely. I don't want it to seem like I'm judging him but especially since he started working a labor job he's gotten more dirty and just has not been showering. How I gently remind him and how can i help keep him on track with showering regularly.

Edit: We don't have the money for therapy. Our insurance doesn't start covering it until we meet our deductable