Been using my G50 for over 5 years with zero problems until recently. Noticing my signal bars on receiver going down and up 1 bar for last few weeks. And have had one quick signal drop. All use in church under same conditions with no changes. I use Lithium Batteries in transmitter which I clip to guitar strap. I'm not more than 6 feet from receiver at any time. Attenaes are at 10 & 2 o'clock. Upgraded guitar cable to gold connection with right angle. Have always used channel 1.