Baby Poo Consistency

My baby used to poo frequently while he was a newborn being fed breastmilk and formula milk. After about 1month plus, I switched completely to formula milk. He is now going 3months old, I notice his poo comes once every 2-5 days and it is ALWAYS watery. It is always so difficult to clean up! Is this normal? I've used up so many wet wipes, tissue paper, cotton etc. #firsttimemom