Fix WPTouch problems with cache

I am having cache conflicts when i activate WPTocuh. Sometimes sites shows mobile version, sometimes responsive, sometimes even loads the mobile theme at the desktop. I've already added the user agents at wp cache. The problem is that my server has another level of cache and i can't disable that. I must use they're cache. My server company told me to do this: a .js and a .htacess mod to tell what user agents needs to be ignored. Please, only bid if you really know how to do it.