Primers no longer work - (Oct/19/2010 )
I have some PCR reactions that used to work like gold and now I'm getting nothing but high molecular weight smears. I know I could order new primers, but has anyone had any success with snap-freezing or any other primer saving technique? If you have a good protocol let me know.
You can try heating them at 95 deg. for 5 minutes, then put them on ice. Primers degrade over time, especially with multiple freeze/thaw cycles. Primers are cheap these days -- no reason not to order new primers.