Most likely the immune system just isnt' functioning well enough due to Lyme and Bart's ability to inhibit the immune system.
Have you tried using high dose lysine yet? I've been using that for the last 6 or 7 years to control my EBV & other herpes viruses. I had the biggest cold sore of my life (literally took up 1/3of my upper lip!) about
a month ago, due to some unavoidable stress. I started on my lysine immediately, the cold sore cleared up in about
6 days (took longer because it was so big and my immune function dropped so far), and I'm still in the tapering down process.
Some articles that may be of interest:
www.dynamiclearreviews.com/l-lysine-for-herpes-simplex-outbreakdanielbeckworth.com/lysine-dose-for-herpes-outbreak/ This is a good article, although you do have to get around the pop up trying to sell you something.
umm.edu/health/medical/altmed/supplement/lysine