A dernged Florida mom has been busted after posting disturbing videos showing her pouring hot wax on her two daughters and starting a fire in her kitchen.

Fire crews were called to Meliza Campos-Sanchez’s Miami home on Sunday over the blaze — just a week after her estranged husband reported fears for his kids who remained with his suicidal ex, according to an affidavit seen by People.

Authorities soon found two videos the 26-year-old mom of two shared with her 55,000 Instagram followers showing her dancing around her kitchen in a silver mask while holding a lighter and pouring liquid onto a pile of clothes — then watching the fire speread.

The…

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