How do you get rid of fleas in a dry clean only comforter?

To get rid of fleas in a dry clean only comforter, you should first vacuum the comforter thoroughly to remove any visible fleas and eggs. Then, place the comforter in a sealed plastic bag with flea treatment powder or diatomaceous earth for a few days to kill any remaining fleas. After that, take it to a professional dry cleaner, informing them of the flea issue for proper treatment. Additionally, consider treating your home and pets to prevent re-infestation.