Smell in kitchen, driving me MAD

[ChickyNuggies]

As the title says, there is a smell in the kitchen that I can't identify that I'm on the brink of tears of frustration about because of the house layout, the smell hits you as soon as you walk in the front door.

Smell is sort of like just gone off meat.

So far I have: cleaned the kitchen, inside all the cupboards, checked dates on things, cleaned the kitchen bin, thoroughly cleaned the fridge and thrown almost everything out, checked the freezer, moved the fridge out to check behind it, removed the kick boards and looked under there, ran the dishwasher on 3 clean cycles, ran the washing machine on 3 boil washes with washing machine cleaner, scrubbed the floor by hand and now I'm out of options.

Anybody have any other suggestions?

Next step would be under the floor as there is a large space under there however it appears you can't get down there without ripping the flooring up

Came here to say fridge drip tray. I traced a horrific smell to ours- it was full of spilled milk that had turned to a kind of jelly

I had a strong smell in the kitchen and like you cleaned everything. It turned out to be a jar of pickled onions that the lid had come semi undone. It was the bizarrely thing and smelt disgusting

Was going to say light fitting as I remember someone having this problem on MN in a downstairs cloakroom.