Q&A for How to Stop Glitter from Falling Off Clothing

You could spray it with hairspray, which will help a little.

If it is cheaply made then there's probably nothing you can do short of trying the water and glue method on the places the where the glitter has come loose.

Hair spray will not harm, no. It will wash out.

No. Just follow the article.

Unless you're around an open flame, then it's not really dangerous.

No, but make sure to use a quality brand. Good brands of hairspray will typically keep the sheen on glitter.

On most shirts, a little will come off. Try using a gentle cycle and less will shed. It's also best to put the garment inside a wash bag, to prevent rubbing against other clothes and to capture any lost glitter so as to avoid gunking up the machine.

Yes. Companies like Tulip make fabric paint or "puffy" paint make glitter paint. Just be sure to check the label verifies it is for use on fabric and also follow the package instructions with care.

You can try a thin layer (or a water mix) of Mod Podge, there is even a spray version too. Make sure to use the gloss one, not the matt one.