Looks to me like you have fallen into the 'I don't like this clearo
tank .. so let me try a different clearo tank instead' syndrome. Believe it or not, but there are other choices besides clearo
tanks. I for one never found a clearo that didn't give me that "dry throat" problem. Buying more of what is essentially the same thing just doesn't make a whole lot of sense to me.
Why not try a simple cartomizer, they're really cheap ($1.25 or so at most places), and see if you do better with them. If you like the cartomizer, then you can buy a tank to use them in.
I use these cartos, and punch them myself (on sale for $0.75 each)
Boge 510 Blank Cartomizer Standard Resistance 3.0 oHM 5 Pack – ElectronicStix.Com
and use them in these tanks (on sale for $12.50)
Standard J-Tank (3.3ml) – ElectronicStix.Com
My tanks are over 3 years old, so I would call them a "proven product".