You step out of the shower onto a partially-wet bath mat. The damn thing is always damp, because the towel rails are always full. So you end up hanging the mat over the top of the shower to dry, but it never seems to fully dry by the next morning.
Consider...
Having enough wall space in your bathroom/ensuite to accommodate a towel rail specifically for your bath mat. Alternatively, you could install double-towel rails, although these are slightly more finnicky to deal with compared to a single-towel rail you can just throw a towel over.