Compared two leak detectors on my roof job, the $20 one won

I was the guy buying the $400 FLIR camera thinking it would save me hours. Then last spring I was chasing a leak on a TPO roof in Tempe and spent 2 hours scanning seams with it, got nothing but bad reads off the insulation. My helper grabbed a pump sprayer with a few drops of dish soap and found the pinhole at a vent boot in like 5 minutes. Felt like a total idiot standing there holding my fancy toy. Now the soap bottle comes out first every single time and the camera stays in the truck unless I'm really stuck. Sometimes the cheap stuff just plain works better.