I have some white “blotches” on my fan leaves. I have checked other posts, but have not seen anything that looks like what is going on with my plant. The white blotches wipe away easily. The white blotches are flat against the leaf, not raised at all. The pic I have does not show the white blotches very well. In addition to help getting rid of the white blotches are these leaves safe for edibles? Thank you.