ABI sequencer, a month of unexplicably bad results.

[Steve Stelman]

Volker Seibert wrote:
> ....  indicate the problem is with our template or primers, but the
> same stored samples of both that did not work when we had a month with
> bad results worked again later!


I know you said you've changed all of you reagents, but a problem I've had before with PCR 
was eventually traced to my sterile water (possible detergent residue in bottles?)