A few days ago I re-flattened my work bench. I gave the newly exposed surface a coat of BLO. I didn't realize that when I first built the bench I applied BLO before I drilled the dog holes. So I think a tiny amount got into the lip of each hole. Today I tried to knock in a holdfast and they just would not hold AT ALL. Previously they held like a hungry lion locked onto a wounded giraffe - even with just hand pressure. Now, absolutely NO GRIP whatsoever - even whacking hard with a mallet. What do I do? Is this fixable? Did I just completely screw myself???