My kitchen faucet spray pattern has gone a little haywire. It's not mineral deposit/build-up... I soak in vinegar solution a few times a year to prevent this. I think it happened when I used a scrubber pad on it, maybe a bit too hard? Not sure... anyhoo, is there a generally accepted approach to clean the nozzles and correct the spray pattern?
I still suspect deposits or debris--not all of it may be calcium, so vinegar won't necessarily help. I'd pull it apart and backflush it.
Then, if you're convinced that the plastic nozzles are damaged, I'd find a piece of wire or a drill bit of just the hole size and gently ream each nozzle out, using a little force to straighten it as you do. They're soft plastic and should tolerate mild reshaping.
If that doesn't do it, look at ordering just that part from a plumbing supplier or the manufacturer.