Baby peeing through nappies

For a boy , if not checked already, then make sure it is pointing down, not to the side or up, otherwise it will leak! You may have already made sure, but just incase x

Whenever this happens with my babies I always just sized up on the diaper/nappy and that seemed to help a lot! We only used disposables though.

My only tip is to just make sure it’s tight enough and to make sure he’s pointing down! Was not something I was aware of at first and our boy kept leaking when I didn’t know it should point down!

Is the vest too small? Sometimes if the vest size is a bit tight it compresses the nappy when there’s wee in it and it causes a leak.

We’ve also sized up on nappies and now in size 2

Have your cloth nappies been washed enough? They get more absorbent after a number of washes I’m sure x

Two minor suggestions/tweaks that helped with my first:
1. Have you tried different nappy brands? Sometimes your baby's butt/bits will suit one brand and be completely incompatible with another brand 🤷‍♀️
2. Have you got the "frills" of the nappy out? We get leaks if the frills around the legs aren't out and the nappy gets too full

My other suggestions were all mentioned above, so hopefully that helps!