I am not sure about calcium deposit but for water spots you can use vinegar & water to wipe down.

Hi, Ann!

Every couple of weeks, I give mine a quick mist with a neem oil and water mist. It seems to make the leaves all glossy and cleans up the water spots.

Carolyn

Thank you both I will be able tomorrow to give these three some attention and try to get the calcium build up off. This is going to take time since my Bella has such very small leaves but is growing very long so I guess q-tips would work.
Ann in So Ut

Hello Annie,
I am no expert, but I have put my hoyas in the shower before but you should do this when they are in need of a good water. I have not had a problem with them dying from this. Just a suggestion, hope it helps you.