Good idea. Oil can gummy from dust, etc. And stay away from WD-40. It’s not meant to be a lubricant, although it’s treated that way. It might help to degunk your slides, but then would need to be wiped away.
Wax. Drip a little candle wax into the track and move the door back and forth to spread it around. Detritus won’t stick to it, it’s waterproof, and pretty harmless in all other ways, too. Oils and greases could damage the finish of your shower, and even worse, if it gets onto the pan, it’ll make it even more slippery. Nothing like calling 9-1-1 when you’re legs akimbo in your birthday suit in the shower because you broke a leg and can’t get up.
That’s not a terrible idea, except that it may be the wheels axles that are getting worn down, so may need to remove the doors to get at those with a wax candle.
Bike chain wax lubricant spray would make that easier without having to necessarily remove the doors.
Plus, I’d be worried 3-in-1 oil might mess with the plastic parts as well.
Another option might be Super Lube. It’s a synthetic, food grade, clear grease that’s pretty cheap, and pretty much inert as far as plastic parts are concerned. And it’s a grease, so it’ll stay in place a little better than oil would in a shower, with hot water and soap everywhere.
Lanoline … organic grease/wax derived from sheep’s hair/wool (not the body) … its that stuff that keeps sheep wool impermeable to water and avoids (evolutionary) weighing down sheep after a long hard rain and making it an easy prey.
Smells like sheep, but the best part is its extremely non-ivasive and can be used on all kinds of material, where mineral oils are advised against, stuff like rubber or latex seals …
the 99% leftover you can apply to dry skin, or lips etc… (chapstick = 90% lanoline ->so that might also work )
Another vote for lanolin. Amazing stuff, and it won’t wash away. It’s the lubricant/corrosion inhibitor of choice on my boat for all my running/standing rigging and deck hardware.
No, I’m virtually certain that isn’t true. What you are thinking of is petrolatum, i.e. petroleum jelly. I am very allergic to lanolin (and to wool) and I use chapstick a lot, plus lips are a sensitive tissue, so I’m sure if it had contained lanolin I would have known about it in minutes. (There may be a brand of lip balm that contains lanolin that I have not tried, but standard ones don’t.)