Just a bit of feedback, if you choose to go the fairy route, the cows are basically useless if you don't have a warehouse. That could use some tweaking.
I've noticed that if I come back to the game after it's been going overnight, clicking seems to speed up the research, but then once I do a Big Crunch it doesn't work anymore. I'm trying to figure out the mechanics of this but I'm struggling.
The hairspray is in this very episode, don't fear! :D You'll find the items you need in each episode, anyway. You'll find at Trixel's flat. If you're enjoying the game, anyway, we suggest you to play the first two parts, too, to better follow the plot. :) We hope you'll like the whole game; have a nice day and keep having fun!
don't worry this site has many games that can cheer you up.