I want to just use Coretox on my full face, but I'm worried that I'll just dilute it and leave it... If I just spend money and it doesn't work... I used to get cheap products at a cost-effective dermatologist, but they didn't work... I think it's not that I developed a tolerance, but that I was scammed because I got cheap products... Is the effect okay here? Do they even show you how to open it?