Keeping kitchen cabinet hinge from working loose

You may get away with just putting superglue in the hole and letting it go off before putting the screw back in. Maybe sprinkle some baking powder (sodium bicarbonate) in the hole before applying the superglue.

Assuming the current screw isn't too loose adding a thin layer to the wall of the hole and stabilising failing chip board may/will give the screw something firm to grip into.

Car body filler in the holes, drill and retap the screws. 100% every time

Get a repair plate which simply screws to the cabinet side and the hinge screws onto the plate.

I've fixed loose screws in ordinary doors by drilling out the whole and tapping in a dowel. Perhaps a pilot hole would be wise if trying that in a kitchen cabinet though.

I would just widen the screw hole in the cabinet wall and insert a plastic wall plug cut to length

The reason I use var body filler is that it stabilises flakey chipboard in a way a plug does not.

Aby polyester or epoxy resin plus filler does fine.

So make the holes slightly smaller and replace the screws --- good idea (although I might use epoxy instead).

I didn't know about the baking soda, thanks.

I don't have car body filler but I do have DIY epoxy. Thanks.

yeah. superglue and baking soda is a good gapfilling fix for many plastic and other breakages. But in this instance I prefer a polyester filler like liquid metal or CBF,

It isn't as critical as epoxy in terms of mixing and in general it cures faster and it is cheaper than epoxy, and is cheaper than epoxy or superglue.. assuming you use it consistently for repairs.

if you have a suitable filler add that as well. You end up with a sort of milliput

Normally I like a good unit price, but I can't imagine using a lot of car body filler in the future. I see 250 ml pots of it --- how long does it last after opening?

I am no authority on the subject, but I believe these Isopon type products use what are called "pre accelerated" resins - which means that the product is eventually going to go off anyway and has a limited storage life

About 15 years.

My experience of 2 part wood fillers is that it lasts a good few years - I've always used it up or run out of either filler or hardener before anything goes off.