If the leaves turn yellow now, cut them off immediately to avoid consuming too much nutrition. When pruning, scissors can be disinfected on alcohol lamp or directly trimmed. Be careful not to get wet or spray water after pruning to prevent the leaves from rotting. Spraying bactericide on the leaves every other day after pruning for disinfection.
Pay attention to cut the tip of the blade into the same shape as a good leaf when trimming, and don't cut it into a straight flat head. It is recommended to have a sharp tip.