Rubbing alcohol works very well on mealy bugs. Just use some alcohol soaked, ear-swabs and rub all of the white gunk off. Or, if you have a spray-bottle, just douse the mealy bugs with it. Be careful...
You can repot the plant into clean soil and watch the amount of water the plant is given in the future...you can use any water based insecticide and even diluted down and water the plant with this...
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