Evidence based research project

I am doing an evidence based research project on IV therapy related infection/phlebitis prevention. There is plenty of evidence out there to support best practice, but the issue I am having is determining what the proposed change might be. Most nurses know that scrubbing the insertion site for 30 seconds, and scrubbing the hub for 15 seconds, avoiding the AC site, and clearly labeling dressings with the date and time is best practice....but how many do it?? What would be a reasonable way to entice nurses to do these types of things? Some type of contest involving a reward? Any ideas? I think that this truly is a costly issue, both in terms of $$ and human illness/suffering. There must be a way to invoke change in the daily habits of nurses involved directly with IV insertion and management.

Thanks in advance!