thing, the probably collect more dust than you imagine.
outdoor plants usually get regular cleaning from the wind and rain. but when you have plants indoors, it’s your job to keep them clean.
real plants that are small enough can be taken to a shower for a quick rinse under water. or if they are too big for that you can usually mist them with some water and wipe them down.
for most silk plants and some real ones, a damp cloth or paper towel is a good way to wipe down dusty leaves.
for live plants, consider the needs of the individual plant to make sure you don’t over water or cause damage 