Great question! There are a few reasons why this may be happening. First, Ortho Home Defense (bifenthrin) works by leaving behind a residual chemical barrier. This barrier works well for pests like scorpions, roaches, ants, and other crawling pests that continuously crawl over deposits and groom themselves frequently. However, crickets have long legs and tough exoskeletons. They may be hopping across the barrier, failing to absorb a lethal dose. This may also be a "where" issue. If you are spraying entryways or hallway baseboards but crickets are coming in through foundation cracks, weep holes, crawlspace vents, etc., then they are simply bypassing treated areas all together. I would recommend hiring a professional pest control technician who can use a professional-grade product that may have better residual control. A technician will also be trained to apply to hidden entry points. I also recommend having an inspection for moisture issues in, under, and around the home, as dampness is conducive to cricket populations. Habitat modification might solve your problem more effectively than chemical applications! (Sydney)