Another product to remove sticky residue is De-solv-it. It has a natural citrus base which shouldn't affect the wood if you are worried about using Turps or White spirit. I got mine from Bunnings in Aus, but I'm sure you could source the equivelent from Homebase or B&Q for those in the UK.
Worked really well, just applied it with an old dry rag. Then after rubbing in for a bit I used the back of a butter knife to scrape off.