is it possible to flush the nutes out of MG soil?

it says 3 months of feeding so if I flush the shit out of it would it take the nutes out?

No,some yes, not all

They are time release globs that slowly disolve over time

If yer having issues go get some Promix hp or similar and re pot them

No.

But why flush them out? Just don't add anymore.

Like @xtsho said, just don't add anymore for a while.

Don't believe the hype either.
Although M/G is not "the best" for cannabis, you can still grow some nice weed in it just fine.