Keep out of direct sunlight. It can fade the wings. Off-set area of sunlight.
Hot areas can damage the insect or butterfly
Moist areas can create mould on the dome or frame.
The domes and frame are easy to open for cleaning. Domes can become duty inside due to the real florals.
Putting mint around the dome or the frame will keep loving critters away.
When your dome or frame becomes cloudy and you don't want to do it yourself. You can bring it to one of my events locally, and I will clean it for you.
Article and research suggests that if the butterflies and insects are prepared right, they can last hundreds of years.