To challenge you to find where the smell in my kitchen is coming from?

[deeedeee]

Smells like off milk, it's driving me insane! Can't find it and the inlaws are coming for the day tomorrow!

Bin has been cleaned, recycling drawer, fridge, looked behind fridge, behind cooker, cleaned all cupboards, floor and surfaces scrubbed.

What is it??

[LakieLady]

A few years ago, we came back from holiday and found the kitchen stank. Like OP, cleaned everything to within an inch of its life, but the smell remained.

Then DP twigged that the smell was much worse when we were running hot water, and thought it might something to do with the boiler. He took the casing off and found a fossilised mouse fused to something in the boiler.

We then found mouse shit in one of the cutlery drawers ... but not till we'd eaten several meals.

[Bluetrews25]

Chuck some Jeyes' fluid down the drain inside and outside. And / or have a prod at it with a bendy wire thing. Smells vile initially, but will probably sort it. Had this at MILs - she kept throwing solid food down the sink and blocked it up. dirty cow she was
Alternatively, is it your old plastic washing up bowl? Some old plastic things start to smell sweaty, I kid you not!