Typically, noncompliant patients are not interested in stopping dialysis. The reasons for their noncompliance are simply the many problems in their life - addiction, poverty, etc. They will certainly not be impressed to hear that the center loses $ each time they skip (as I know it does) and I'm sure you wouldn't tell them that anyway.
Perhaps some kind of incentive - I wouldn't want to call it bribe - might help? As for what that could be, I'm at a loss right now... maybe a drawing for a cash prize if you miss less than x% of your tx's. But that would be a bribe... Maybe the clinic social worker could help you with the this, or even the dietician - they often play games with the patients (bingo)and give them small prizes, so they will know what's appropriate.
Best of luck,
DeLana