[header] How to make glow sticks glow again [title] Find a little extra light. [step] Crack the glow stick down every bit of its length. If no light at all appears, your glow stick is completely used up and there's no hope for it. 
If you can get a tiny bit of light, even just a couple spots, you've got something to work with. [substeps] The light in a glow stick is caused by a reaction between two chemicals.