My new Rubber Plant keeps getting tiny white spots on one leaf. Itās along the edge of the smallest leaf. Itās also the oldest leaf. I can wipe it away mostly but it comes back. I donāt see anything on the back of the leaf. When I brought it home it was covered in dust but I didnāt see anything buggy when I cleaned it or since. Just these white spots. Is that normal or do I have a problem?
