AITA for not allowing my kids go with their father?

I’m a clean and neat person. I believe in the kids being neat and clean as well. I recently discovered that non of the values and belief I instilled in my children was followed. My kids would come telling me how they would skip out on showers sometimes at their fathers house and the reason why is because neither him, his wife, or her kids believe in regular baths. I don’t want my kids to think that that’s something they shouldn’t be doing on a daily. Now when their father ask for them I make excuses so they won’t go. I’m trying not to hurt anyone’s feelings. AITA for doing this?