Likewise with my Line 6 G55. First thing I did was get one of obbm's excellent braided cables to replace it.
FWIW I've had Trantec, Nady, Shure, Ashdown and AKG wireless sets in the past and the G55 is better than all of them. The Ashdown was totally unfit for its purpose, just made a wall of noise with a mangled signal. For rehearsals I've got one of those tiny cheapo Ammoon rechargeable sets** in the gig bag and it does fine for that. If I was buying a new wireless now I'd definitely investigate that Harley Barley one, it'd fit a treat on my wee pedalboard and would free up rack space.
** apparently they do a 5.8GHz one now too. Interesting.