Ive had no end of trouble keeping water out but always seems to find a way in!

Cars an mk4 xr3i cab and so far ive had water coming through

Back lights, had to silicone up
Rear bumper, had to also silicone up
Battery tray (was rotten, now repaired)
Fusebox, silicone did the trick here as it was coming through the hole

I now have it coming in at the door seals i think. Just noticed it on the drivers side. Was thinking of taking the insulation out and not bothering with it, anyone else do this?

Just don't want the floor going as its as clean as anything inside at the moment!