Is mixing grease in gel bait more effective against cockroaches?

A friend told me that bacon grease, jelly, and Borax will kill cockroaches. Does that really work? - Quora

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Effects of six interventions (4 TRF products, 2 gel baits) on B.

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What are these? And how do I get rid of them? : r/bugidentification

Why can't the exterminator fix my German cockroach problem? 3 treatments later, they are still rife. My unit is clean and my neighbours say they don't have a roach problem. The exterminator