Treating extractions with RNase

[jpark153]

Hi. We have a collaborator who wishes to prep ddRAD libraries using several hundred DNA extractions, but they have not yet been treated with RNase A. They extracted rat kidney tissue using the DNeasy Qiagen kit.

I've been told that we can treat with RNase A and put it either through a column or do a bead cleaning. Has anyone done either of these before or have suggestions for a relatively cheap option?

Thank you!