Fort George Botanicals Ltd

Though it might be a tedious task, it's important that you clean residue from plant leaves on a regular basis. A layer of dust on the houseplant foliage will block sunlight and reduce the plant’s ability to photosynthesize. Photosynthesis is how the plant feeds itself. The best way to determine if a plant needs cleaning is to rub your fingers on the leaves. If you can feel or see more dust than you can blow off, it’s time to clean.

Go to
https://www.thespruce.com/how-to-clean-houseplant-leaves-1403206
For more info on how to keep your houseplants happy