How to get husband to shower!?

My husband showers once a week. It's gross. He does it becuase he's lazy, he has a full time job, leaves at 6am and gets home by 7pm. He eats then goes to sleep. He will shower either a Saturday or Sunday when he is off. I'm so disgusted by it since I am the type of person to shower daily, twice daily sometimes if I feel really gross at the end of the day. Iv told him about it and kind of mentioned it. He knows I think it's disgusting but he just doesn't care. He will leave to work wearing dirty pants, I brushed teeth, flakey hair and I'm so done with it. I bought him new clothes like a bunch so he has something clean all the time and something without holes yet he re wears the same pair of pants daily and the same 3 shirts. He used to take care of himself, showering daily, fixing his hair, taking pride in his appearance and clothes but now he does not care at all! He is NOT depressed I can promise you, he is just lazy! What can I do!? Iv told him he needs to take more pride in his appearance especially for his job! And it's embarrassing sometimes when my friends see him and he looks like a bum!