I highly recommend avoiding cue tips of any sort for cleaning negatives. Cotton swabs often contain silicon from the soil and you don't want to be rubbing glass shards against the base side of the film. Only the synthetic ones do not contain silicon and its a crap shoot what you may find yourself using. Use pec pads.
Thanks for the tip! While these are not Q tips they are cotton, as far as I know. I'll check the packaging.