I need to get a spray for allowing the curtain hooks to glide along the rail. There are loads on Amazon and I don't know which to get. One of them is WD40. I don't know whether it's the same WD40 that I've used on door hinges, but that has a fishy smell and drips and is very oily. I want to make sure that whatever spray I get for the curtain rail won't drip onto my curtains and stain them!
If there's one that you've used and found to be good, I'd be grateful to know!