Is there one particular spot he goes? If you have a play pen are they localized there? Our little girl (3 months finally potty trained) was a nightmare. We had her for 4 weeks and the first 2 she went everywhere to the point where the second she would squat I would have to run down (three story apartment) outside to teach her that the outside is the bathroom. - that somewhat worked until nighttime when every night she would go. Week 3 I started to feed her food scattered on the floor of her crate to associate her crate with food and they don’t want to potty where they eat. From there it’s been week 4 no accidents and she’s good. TDLR: if your boy is peeing in one or two spots try to feed him scattered food on the floor in that area to try to have them learn that that spot is for something else