The Fast Fret I know comes as a wooden stick with an impregnated pad on the end, not a solution in a plastic container. Are there maybe UK and US versions?

I swear by WD40 for most things, especially locks and squeaky hinges. But guitar strings? And on a Martin fretboard? I think I'll need some convincing before the can comes out.

Norman

PS I have a brain wave for the perfect female perfume, designed to attract the interest of most men...... it has a faint suspicion of WD40.