We moved into a 5 year old new build six months ago and I'm being tormented by the smell of something disgusting, kinda fishy coming from 2 of my kitchen cupboards. Weirdly, the one next to them smells fine. Every time I open the cupboards I want to scream. I've scrubbed the hell out of them.
I had a handyman out and he removed the kick boards and there was nothing under there, barely even any dust, no sign of damp or wet patches. I then made him remove the back of the cupboards too (in desperation) and still nothing. But, when he first opened them he said he couldn't smell much but as soon as he took the back off the smell hit him.
So what could it be? It can't be anything dead, there's nothing there at all and it's as strong as it was 6 months ago.
Please help.