EDIT: Forget what I said below, theis working right now!
Like Gain on Facebook and then watch your news feed today because at some random time they'll be posting a link for free Gain detergent. I'm traveling today, so I'll most likely not be around when they post it, but I have a feeling some studious Hiffer will mention it on HIF's Facebook page. *wink wink nudge nudge*
[thanks Freebies 4 Mom!]