Nitnem(Reading Bani , Simran , Sangat (choose atleast one of them rest two will follow up! Also do them in amritvela preferably) ) is prevention which i think is missing in your house as it seems from the environment (nitnemi never go to pub) & Ardaas is cure.
However ardaas won't be effective unless you have nitnem so start it urself first and then reccommend it to rest of family members.
40 days without a naaga(miss) and with guru's grace you will see the symptoms fading away. However never stop nitnem!