Prior to the 6 month ban, I experienced a problem with waking up using water techniques -

It was working for about 2 or 3 weeks, but then I stopped waking up. I made sure I drank enough water, the same amount, not too much so I wouldn't have to urinate, etc... But now when I try it, I fail... Not even waking up. It occasionally works.

I'm pretty sure It's because I got used to it, but is there anything I can do to help me use this again? I'm not very good at using other techniques to wake up.