Stalactites, Stalagmites

How do you remember which are stalactites and stalagmites in a cave? And how to spell them?

The key to getting the whole thing the right way round, in my mind, is to remember that you need to cling tight ("tite") to the ceiling. Once established, you have a letter C in stalactite that fits the cling and ceiling. And stalagmites, with its cheeky G, naturally then is the other one which would grow on the ground. Sorted?