> I didn't realize just how far they could spray.

i’m assuming you’re the mom? ;) Yes the pressure starts off strong, can easily fly onto their face lol. happened to me…fun times.

> somehow the back of his clothes keep getting wet while he's fully dressed in and in a diaper which completely boggles my mind.

We just solved this recently with our baby boy. I can try to offer some tips. He likely needs a different diaper size, or (more likely), his penis isn’t correctly facing downward when putting the diaper on. 1st secure one side, and before you secure the other, peek at his penis (looking into the diaper from the side - near his hips). Make sure it’s pointed straight down and adjust if necessary. then quickly strap the other side. Basically you want the diaper to gently and firmly keep that penis pointed down all day. When boys are about to pee, the penis becomes briefly erect. If the diaper is not firmly holding that penis down, the penis can easily drift sideways and shoot urine in a weird direction. When this happens the urine can leak around the hips and up the back - instead of going into the absorbent pad. A quick test - when you change his diaper, is his penis still pointed down? If not then that’s the issue. If it is, try other troubleshooting steps.

Girl diaper changes are “easy” in this regard.

Two things that helped us: 1) "activate" the diaper [0], they are tightly pressed for transport and have to unfold the fabric to soak well. 2) Make sure the side guards are up, tight fit around the legs and a short pull around it to adjust them and not have the guards folded under the seam also helps.

[0] https://cdn.shopify.com/s/files/1/0700/5519/8950/files/brief...

> Yes the pressure starts off strong, can easily fly onto their face lol.

Into their face? Try onto the ceiling or a 6-8ft arc in any direction. One of my coworkers warned me so I usually had the situation under control but my wife had only ever changed girls (young cousins and kids she babysat), thought she was prepared but wasn't.