dropin teardown not working

[aphavichitr]

I'm having issues using the teardown method to destroy the drop in. I'm calling the teardown method in beforeDestroy life cycle hook, but I'm still getting this error:
DropinError {name: "DropinError", message: "options.selector or options.container must reference an empty DOM node.", _braintreeWebError: undefined}

(warning)
PayPal Checkout Integration Script already loaded on page

How and where did you put the teardown method?

Thanks