Sticky DNA after Hind III-Why?

[LOGAND]

Does anyone know/or can provide a educated guess as to why genomic DNA, 
when digested with Hind III, smears down the side of the tube after 
precipitation (standard sodium acetate/ethanol) and spining, while other 
REs give nice pellets? This is not a problem, just curiosity.
Is it because of the buffer, the enzyme, interactions with the salt?

All answers gratefully read.

Thanks

David C. Logan
INRA-ENSA(M)-CNRS
Montpellier
FRANCE

Logand at msdos.montpellier.inra.fr