Our domestic hot-water system is a cylinder with an airing cupboard above it. If yours is the same, buy a few of those cheapo shopping bags (Save plastic: Save the planet.)and thread them on a suitable slat so that they hang down by the cylinder. Longer-term warm storage. In my case, for arc-welding rods and spare soap (it gets harder, stays harder in use.) Socks on cold Norte Americano mornings?