Some flower designs are assembled with water based adhesives.
Therefore it is preferable to keep them dry.
Cleaning can be achieved with cool air from a hair dryer to rid the flower of dust.
Most plants can be washed in water such as a soft spray from garden hose.
Hair dryer or vacuum cleaner can be used to remove dust.
Strong winds can damage the leaves on plant and therefore the plant should be installed in a wind sheltered area.
The ultra violet rays from sunlight will change colours over a period of time in flowers and plants resulting in fading.