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I would sand down to bare wood and start over. Doesn’t get much love on here, maybe because it’s too easy, but I always recommend using straight mineral oil, the cheap stuff, to cover your wood countertops.
This is what John Boos, the manufacturer of our (industrial) maple countertop says. The technique is to apply once a day for a week, once a week for a month, once a month for a year, and then once a year or as needed thereafter.
If your wood countertop surrounds the sink, remove it : )
Is there any other option when you've got sticky wooden worktops apart from light sand, re oil?
I've wiped with white spirit and that's not really done much. I've tried citric acid (mild) rather than lemon juice.
I've got a feeling it's the cleaning spray and food forming a lovely matrix of gloop on the surface.