1 cent per click is almost a waste of your efforts... try using affiliate marketing on your site to gain extra income.. with your traffic you should be making a lot more than $4/day
if you are up to it, you can filter lower paying sites. but you may not know if its the culprit. try and see if it bumps up to your early pays. but then again, niches can fluctuate. anyway, its the best course of action for now. good luck.
yes ive already done this. it doesnt help. Im moving on and starting to use zango. I made $50 bucks my first day!