I have been vaping for about a year now, and feel quite experienced, but I got my REO Grand about a month ago and think its the greatest thing ever. There is only one thing that eludes me. How can you clean the tube that runs down into the bottle, I always seem to have the flavor of the previous juice come up for a little while to spoil the flavor of the new juice I am about to vape. Any Ideas? 
Sincerely
Syardley
(shane)

Sincerely
Syardley
(shane)