I can get a messy stall pretty clean, even most of the small stuff.
Make a bank of clean-ish shavings against a wall with bare floor in front of the bank.
Launch dirty bedding at the wall above the bank. The manure will roll down onto the bare floor area & the shavings will add to the bank.
Wet spots are shoveled up.
I figured this out because I bed deep & am too cheap to strip a stall & I want it done quickly.