keyless entry

I received 2 sets of keyless entrys with new Prius. I thought I would share this info with the group. The keyless entry battery in the set my wife uses started getting a reading "key not detected" so I changed the battery and that stopped that. This was in Jan of this year, car being 3 year old, battery died. The set that I use started not wanting to unlock the doors and also the same readout in the dash panel so I did the same for my set and thought that corrected the problem but not. A month later it started doing the same thing again with my set. I changed the battery again. This worked good for a few weeks but started repeating the same thing again, wouldn't unlock the doors, sort of off and on, sometimes it would and sometimes it wouldn't. I decided to take a look inside and work on the keyless entry myself. The thing that fixed it was, there are springs inside that the battery lay against to make contact I guess. I took a small pen and pulled up each bow spring I will call them and that corrected the problem. Its been a couple months now and no more problems. Just thought I would pass this on. I've found the forum to be helpful over the last 3 years so this may or may not help someone in the future.