I've had a channel that has like a real low CTR with about 10k impressions. We're talking really low. I have other channels with decent CTRs, and high impressions. Lately I noticed I'm getting .04 dollars a click, and have no idea why.. Is it because the low CTR channels are hurting the high CTR channels? I've deleted all low CTR channels like DP's, do you think it'll help?