Illegal for VA to not prescribe a sterile catheter - and enough for "emergency use" for all its vets! Note_this was 2008. However for non vets this- or similar- is what is recommended.
Also note newer research indicates smart bugs can live for months on dry things so that is not true with most organisms.
However, colonization of organisms in chronic IC or indwelling catheters is expected and though the organisms would be there, there would be no symptoms.
We recommended HOT soapy water and rinse with HOT water.