This tip is a bit personal for me. As it happened last year and I should have taken photos. We have a triffle bowl. It’s used once a year, for Christmas. And it used to be stored up high on top of the cupboard. Last year it had a number of critters crawl/fly into it and die. Some of them had oozed out, and this had dried creating a sticky looking situation that could have been difficult to clean.
A few squirts with Xtreme Clean (at a 1:5 mix) and it all wiped away with a cloth, the bowl was rinsed out and was ready to use. So you run across something that has gotten messy with age just give Xtreme Clean a go!