We have Ikea wood worktops in our utility and kitchen. Utility is whichever was cheapest about five years ago, strips of beech I think, and kitchen is Karlby, the one with oak veneer over a chipboard centre, which is about a year old.
The one in the utility room was unfinished so I got some Ikea Behandla and painstakingly applied three or whatever coats but it never seemed to look/feel any different. Eventually I tried putting a really thick layer on and leaving it to soak in and it just went really sticky! We then treated it really badly for about three years (it was effectively our kitchen sink) so it now needs a bit of sanding and retreating but am largely ignoring it as it's only in the utility room so not really seen.
A year ago we finally got around to having a kitchen put in and by then Ikea had introduced Karlby, which is a wood veneer that was pretreated. It still looks great and feels about the same as it did when installed but I've started re-oiling as part of my late pregnancy lunacy.
Having read other threads, I've got some Osmo Top Oil and have applied two coats today, but again it doesn't seem to have made any difference whatsoever.
We also have one of those huge wooden Ikea chopping boards and I've put a couple of coats of something (can't remember what now, this was a year ago) on that - again, no obvious difference.
My MIL has wooden worktops that look/feel like formica they're so shiny and smooth, and my friend had a kitchen put in about three years ago that they only treated once, when put in, and again it is smooth and shiny. I've tried brushes, clothes, thin layers and thick layers - what am I doing wrong?!