Dear All,
Thanks for your comments re my question. I shall summarise my thoughts here.
I think SwingBeep has answered my question, that is, the liner plastic cuff snagging on the boot cuff. I shall be aware of this and try to account for it. I shall avoid trying to put the liner on my foot, and then both foot and liner into the boot, as I can't believe this will do the liner much good.
I don't need to remove my liners every day. However, if I don't remove them at all, by the end of the week, the liners will feel damp and there may even be some water drops in the bottom of the boots. So, taking them out every day avoids the problem. I have not had the luxury of heated boot dryers, and have typically stored my boots in cold dampish rooms, taking my liners to dry in my warm dry accommodation. Once, one boot room was like a Turkish steam room.
I don't have abnormally sweaty feet - honest - but skiing all day long and boots getting covered in snow, the boots will inevitably absorb some water from snow and feet. Yes, the salopete liner should go around the outside of the boot and not on the inside.
I understand it is not good practice to place boots on top of a radiator, or even adjacent to one, as the heat can deform the shape of the boots. A dry well ventilated place at room temperature place is best.
