I had a quarrel with my mother-in-law and bought cool diapers for my baby, but her mother-in-law refused to use them. She said it would be better for children to use diapers. How can I convince her?

You don't have to persuade her to buy some disinfectant to disinfect the baby's diapers, and then don't take the baby away at night and give it to her mother-in-law. If she can stand the pain, let her eat. If she can't stand not taking it, then you say don't get wet, otherwise she can't take it off. Do you think she will argue with you? Reasoning is useless, old man. Prove it to her, and she will know which is better.