Okay, I'm trying to get the light inside the DeLorean to go green after I put the spray bottle of Emmett's solvent in there to make it turn into acid. I put it in there, check the light, it's still red. I leave to go to Emmett's lab, come back, and check it again, still red. Every time I remove the bottle, Marty says it needs a little more time to become acid.
I'm getting frustrated here because I've done all I can think of and it won't go green. I've checked the boards at Gamefaqs.com and there are no messages there whatsoever.
Can someone please help me out? Or is it glitched?