are you using your suppression list? look at your page, go to the sites that are listed, don't click your ads idiots! see if the sites are affiliate arbi sites or real sites. If it is not a "real" site block it!
change to a 336, 300 or 250 ad block or use the dp tool
digital point has an adsense tool that will let you view the sites that will advertise on your page, I have not used it in a long time but ...