I run distilled water and water wetter in my track bike. I notice after a track day I'll have to add some to get it back to at least the minimal level in bottle. That's where I normally keep it. So it uses some during the track day. I don't seem to be leaking any and it doesn't seem to go down while the bike is sitting around. Is this pretty normal as the water heats up and evaporates some? My father was telling me in a closed system there shouldn't be evaporation and since it's not boiling....