I just received a new PSI glycerin filled gauge from TFTestkits. I wrapped the threads with teflon tape and screwed it in. I noticed that it didn't seem to tighten well after several turned unlike the old one I took out. I turned the pump on and seconds later, the gauge blew out. I tried wrapping more tape on it with the same effect. So I put the old one back on. Any recommendations on how I can get a tighter fit?