Want some research? This slogan was used at my Hosp:
"SAVE that line!"
Scrupulous hand hygiene before and after contact with all vascular access devices and prior to insertion.
Aspetic technique during catheter insertion and care
Vigorous friction to hubs. Vigorous friction with alcohol wherever you make or break a connection to give medications, flush, change tubing or access injection port or add on device.
Ensure Patency- flush all lumens with adequate amount of saline or heparinized saline to maintain patency per institution policy.
from this site w/ plenty of other goodies: http://www.maximusmedical.com/understanding_bsi.html
My hosp had a core PICC resource team of about 4 RN's who did audits, posted colorful posters w/ slogans like the one above, etc. Might be a worthwhile in-service, or a 5 minute PSA at your next staff meeting? It's actually such a simple practice it's sort of silly to give it too much time. Good luck!