I have a multi page auto blog. The niche for each page is somewhat similar but different. I cant seem to get any ads that are relevant to my auto blog on each page. A few are, but the others tend to be food related. I have some hidden text but have not seen an improvement in two weeks. The text is in the nested comments: <!-- google_ad_section_start --> <!-- google_ad_section_end --> Once again, i have not seen an improvement with the above mentioned method. Any pointers?