The RNA has to be linked to the membrane if you want to strip.
Increased stringency will strip the probes, and your sample, otherwise.
Cross-link under UV .. it isn't necessary to have a fancy cross-linker
as I've used the transilluminator to crosslink (usually a couple of
minutes works well).
Key Centre for Applied and Nutritional Toxicology
RMIT - City Campus
p.falckh at rmit.edu.au