Remedies for Mealybugs

I saw quite some white eggs in the soil of my plants which are over 2 years old. I am sure these did not exists earlier. On searching the internet I found that these are Mealybugs. Can anyone suggest ecological treatment of these bugs? If possible home made remedies.

Regular spraying with slightly soapy water. That's a generic remedy, not sure if it works well for mealybug or not. Me, I'd just use some harsh chemical insecticide