I am new to vaping anything other than the disposables. I just got a Provari with a Kanger Protank. I am coming down to the end of my first tank full of juice on the Kanger. I would like to try out anotheer variety of juice that I purchased. Is it required that I clean out the Kanger before I reload a different juice? If so how does one clean a Kanger? Do I just run it under water and dry it off. If so do I also rinse off the head? Thanks for any help with regard to this matter. Stu