Recently, I have found a few 2000 dimes with weak 0's. Has anyone else seen these? The 6's are extremely faint and almost not legible. Sorry, they weren't 2006 dimes, they were 2000 dimes... I already messed up my first post!
Howdy chump change - Welcome to the Forum !! Pics would be a big help, but it sounds like what you have are filled die errors. Dirt & grease can sometimes fill the recesses of a die so that some of the devices appear quite weak or not there at all.