Run some beads on a scrap bit of steel, whilst slowly increasing/decreasing the wire speed.
Too slow and it'll come out in blobs, too fast and it'll feel like a machine gun.
Somewhere between the two it'll feel 'right' and you'll get a nice sizzling (often described like bacon frying in a pan!).
Also make sure the metal you're welding is clean, and your ground clamp is attached firmly, and close to where you're welding.
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