Curtain tracks dragging a bit, so I thought I'd wipe them with some silicone polish. But we've used the last of the jar of silicone cream that we used to use, so went looking in the supermarkets, and then online, but couldn't find any. In fact several were advertised as silicone-free, as if containing silicone was some sort of disadvantage.
So whatever happened to silicone polish?
As it happens, I have an aerosol can of silicone lubricant which will do, failing all else. It's just that you can apply the cream polish where you want it; with an aerosol I usually get some overspray which I'd rather avoid.