Your crap doesn't work

I installed your Fobo Bike 2 on my 2014 Yamaha v-Star 950 Tourer. First, I used the lock nuts as instructed, then installed Your Fobo pressure readers and snugged up the lock nuts per your instructions. Pressures on both tires read great except all the air was slowly leaking out of BOTH tires NOW. So, I removed your devices and the lock nuts - I thought the lock nuts might be causing me not to get a good seal from your devices and my valve stems. Aired my tires back up to correct pressures. Re-installed your Fobo devices WITHOUT the lock nuts to see if this resolved the problem. NOPE ! All the air was leaking out of BOTH tires again. Both times I tried your devices these were fairly large air leaks; tires would have gone flat in 15 minutes had I not intervened. So, I removed your devices again and re-aired up both tires. My tires and valve stems HOLD pressure just fine as long as I don't install your pressure reading devices. I AM VERY, VERY DISAPPOINTED ! On both attempts using your product, I made sure the Fobo's were good and tightly screwed on my valve stems. Going to return your product !