What uses are there for the spent flower after vaping it in the SSV? Is it still worth smoking?

Not really worth smoking.  The point of a vape is to eliminate combustion and reduce tars.  So do not smoke duff.

But, Duff or already vaped herb is great for edibles.   Or you can just eat a teaspoon up to two tablespoons for some of the best edible effects ever.

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