Within 10 mins of sticking some LED strip to the underside of our wall units my LED strip has slowly peeled off.
Anybody else had this issue and if so how did you fix it?

Clean it first. It doesn’t take much airborne grease to stop stuff sticking

If its already peeled off once it is very unlikely to re-stick. You could add some adhesive. ‘Sticks like’ is pretty good stuff. Alternatively a few mechanical fixings. I use these lights a lot commercially in other applications and I always add an additional fixing; either a zip tie, a twist of wire or a small screw every 100mm or so. Depends on the arrangement as to whether this is practical.

Cheers guys. I’ve cleaned the underside of the units with acetone and the strip has stuck for now but as you say it may well be past its best now. So I’ll look at some mechanical fixings.

4 inch nail?

Glue gun silicone or contact adhesive.

Sugru a bit of Lego to both surfaces?
Cable tidying by Sugru.

Glue gun silicone

This ^
Dead easy to apply, unlikely to just fall off, but can be removed.

clean and then get a narrow strip of double sided adhesive.