It probably looks damp because she said that she washed the sand thoroughly before putting it back in. IMO it can be damp as long as it's dry on the hot side.
Edit my previous post too- I thought it was the small 30cmx30cm tanks. The 1.5ft one is plenty big enough
Edit my previous post too- I thought it was the small 30cmx30cm tanks. The 1.5ft one is plenty big enough