I have a Panasonic KX-TG6572R answering machine with 2 handsets. One of the handsets has a lot of miles on it. Apparently I hit the off button too much because sometimes it will not work. In a week, it has not worked 3 times and I didn't know it at the time. For example, 2 of those times I would be here minding my own business and my friend would come over to check on me. She said she had been trying to call and it would not go though. I hit the "talk" button on my phone and the line was as "dead as a doorknob" and I didn't know it. The other time I had called my vet and was expecting a call back but I didn't receive it until the next day. She said she had tried to call me the day before. I failed to ask her why she couldn't get me but since this has happened before and after, my bet is it happened with her also. I did a google search and learned that the keypad could need cleaning but I never found out how to do it. I thought I would ask my son-in-law if he could do it but if he can't, I'll try it myself if I can find out how. I went ahead and ordered another set but a updated one to use in the meantime. But, if I can get this one cleaned and working again, I'll keep both to use one as a backup because if it happened once, I'm sure it will happen again. Does anyone know how to do it and if so, would you mind sharing it with me?