You should stick to one incentive chart for as long as it takes to establish a new habit and make it stable - you should not have to remind your child or nag in order to get the task done.
Waa in aad ku dhegnaataa hal foom abaal-marineed inta aad ka shaqeynaysid aasaasidda caado cusub aadna kaga dhigaysid mid xasillan - ma aha in aad soo xasuusid cunugaaga ama aad ku dhibtid in uu sameeyo hawsha.