As an addition, this is very similar to a thread I started in the UK section. I am new to e-cigs, I am using a Titan 510, and I bought some super-high strength Menthol from TW in the UK. I found it dried my mouth a lot so wanted to dilute it a little. I diluted the liquid with Glyerine BP (medical grade) about 70/30 using eye droppers into a mixing bottle and it was much more mellow. It doesn't seem to have affected the atomiser at all but I understand that you can dilute it further with distilled water if the fluid is a little thick.
Hope this helps.
Kev.