Can any suggest a good one ( from experience ) that doesn't start to leak or drip after a couple of months.

My bum doesn't leak or drip after a few uses of the bum gun.

So long as you are not getting one from Mr DIY, and spending more than 200-300 baht, they all work fine. An Hafele one from homepro will set you back 500 baht, quality German engineering.

Karat brand have been the most reliable for me. 

Global house metal handle not plastic has work for me for years when they give trouble I replace them but you have get it fixed up correctly. 

VRH by far the best I have used here.  Reliable and long life.

Hafele products are good... their prices vary depending on style and quality.

 

Haha, thought that was trade lingo for some sealant device you hook on a belt behind your body.

 

"Ass hose" as I call them.

Just buy a Bidet....