What's the jelly on the leaves? How to treat it?

It is purulent mucus containing bacteria that overflows from bacterial diseases in the affected area, and generally spreads in the form of dewdrops or bacterial liquid layers.

Generally, it is often seen in places with insufficient light and poor ventilation for a long time and when watering is frequent. It can be improved by improving the conservation environment and reasonable management, without spraying.

Water less, don't spray water on the leaves, and get as much sunshine as possible.