First, buy an angular broom with soft bristles and gently pass over the popcorn to remove the debris. You will loosen some popcorn and it will of course fall, but being careful this will work.
You could also get a wet vac with a longer hose and attach the brush and with a long ladder pass over the popcorn this way.
After a while you will need to re spray it. This will cover the glitter that you have.
hope that this helps
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