Solana does not appreciate being restrained and having her mouth/lips cleaned and having the antibacterial cream applied. Having said that, she's a great sport and is handling it better than I expected. It's also something I can do myself as she's a corn snake and not too difficult to control/handle while applying the treatment(s).
I have decided to apply 1X a day instead of twice a day (which the vet said was fine) as I need to balance keeping it clean and helping it heal without stressing her too much (which would be counterproductive).
I'll keep everyone posted.