Next time you go to the vet you may want to ask them about synotic. it worked really well our girls I think the main thing is just to scrub them. Hers lasted 4 weeks at 4 months old.
Darby 06-18-04 Fwn w/msk cropped/dckd - Cami 07-01-2005 Flshy Fwn cropped/dckd
Aurora 03-06-2009 Flshy Fwn cropped/dckd - Gretsky 01-03-2010 Flshy Brdl cropped/dckd
Nancy 10-31-00 to 08-2005