wizard DNA cleanup

[See.my.signature]

HI netters
This is a note to add to the traffic on wizard preps - I have noticed that
the DNA purified from columns does not store well - if run on a gel after
1-2 days at -20, it becomes a smear of high molecular weight (not
degraded) DNA.  I have tried to get round this by extra washes but seems
to make little difference - anyone else have this problem?

replies to newsgroup please
Colin MacDiarmid
Auckland University, New Zealand