I do not know if I believe this. I do know that wd40 gets gummy over time, much like fish oil. I have experimented with wd40 & fish off of dock in clear water. I dropped a spoon amongst a school of bluegills & they scattered. The next day, the same spoon with wd40 sprayed on it attracted them. I was running a 40’ head boat with 20 customers on it & a 10 lb fire extinguisher fell off of a bulkhead & emptied right between me & the mate. Our rods & reels were between us & the extinguisher. 8 hours later, all 20 customers had caught fish. The mate & I had none, I usually catch more than my share. I went home & showered, then sprayed my tackle with a hose & then wd40. The next day on the boat, I went right back to catching fish as normal for me.