Well…
If you have a maple fretboard, you should NOT be putting oil on it. Maple fretboards are finished with some sort of varnish or lacquer. Oil should only be used on unfinished fretboards like rosewood.
If you oil a maple fretboard it will sit on the surface and not absorb, which will make it slippery and, eventually, sticky as the oil dries out and gets dirty.
I suspect this is your problem.
In this case, I would carefully wipe off as much oil from the fretboard as you can with an absorbent cloth or paper towel, and don’t put any more on.
Cheers,
Keith