Today I've noticed on my delenatii something strange. It looks like some cells at the surface of the leaf has dried out. The color of the leaf hasn't change and from beneath it looks absolutely healthy. So, there is no colour change, but just at this area the leaf is thinner than at the other areas of the leaf. I cannot make photo. This is only visible if to look at the particular angle. I have this delenatii not for long time and I'm not sure if it came like this. I also have roth with the same spot but it came like this and i didn't do anything and it is not spreading. The delenatii has two affected leaves with one affected area on each leaf. I think I repot it just to make sure the roots are OK. But what do you think of those spots?