Is it unreasonable to get your dad to wash his hands after he eats a burger... before he goes and holds your 3 month old??

I was like you just ate a greasy burger! And he's just standing there holding my baby like "aww man seriously why?? I'm not contaminating him" i said you are with grease... and it's common sense to wash your hands after you eat and common decency and courtesy. And then he says you wash your hands BEFORE you eat. I said BOTH. And then he puts the baby down and says "i can't believe I'm being lectured by my own daughter". And i said yeahh about MY OWN SON. wtf. WASH YOUR HANDS AFTER YOU EAT!! especially when handling MY CHILDREN. It's sooo hard for him to wash his hands. I always have to tell him to!!! Why is he acting like I'm crazy???