Water leak into hatch/boot

[fiesta15!]

Hi All from Australia! I have a 2016 Fiesta which I have just purchased (it’s my 3 rd one) I am getting water into the rear hatch, heres what I have sealed-
Rear lights
Hinges
Weld seams
Roof gutter/strip
ALL holes are sealed in hatch.
The spare tire well is always dry, the wter gathers on top of wheel arch area.
I have just finished the last of the sealing and if water still gets in, I will admit defeat and will just keep drying it, it’s never alot so I am stumped as to where its coming from.
ANY other advice or anyone else in the same boat as me? ( no pun intended😂)
🙏🙏

 

[Handy Andy]

How is the seals on the doors, referring to the upper seal and it's seat?

• - for by location of leak - the dripline would flow back into the rear hatch and with the added the tip of only affecting the top of the spare's wheelwell tends to lead me down the rabbit hole of a door seal.

However not seeing any visible water entry directly, means hidden seam leaks unless the rear spoiler is somehow cracked - and that requires some disassembly. then possibly the dripline from it would be from either the exterior rear upper trim panel valence (where there is a button and the license tag lights are housed, or the upper spoiler somehow got whacked and is damaged.

You'd have to look more closely at the rear hatch lock mechanism on the hatch side and see if there is evidence of flow onto the bottom catch. I'd see if a rust trail is showing - might have to lift off and remove that bottom protective panel that covers the rear sill and catch - to see if you can find more evidence.