You will get there, I promise.
Even though I passed my OCLT I had a similar issue, and had to double my FC levels for a few more days to resolve the issue. That's probably what you need to do too because your slam was done fairly quickly and you might not have got it all.
Could you post a pic of what you are seeing? I want to ensure it is algae and not just dirt/dust because that stuff is bad right now.
If you are certain you passed all 3 criteria for OCLT then Per the Chlorine/CYA chart
http://www.troublefreepool.com/content/128-chlorine-cya-chart-slam-shock With your CYA of 60, your FC Target level is 7ppm, so double that, and raise and maintain your FC level to 14ppm for a few more days, and that should take care of the issue.
If that doesn't resolve it you'll need to go back up to Slam shock level but we'll cross that bridge if we have to, but hopefully you won't have to.
Also continue with the sweeping and vacuuming and ALSO try placing a knee high panty hose or a skimmer sock in your skimmer basket to help trap more of the smaller particles. Here is a thread that I wrote on the benefits of putting a knee high in the skimmer basket there are other items that can be used as well in the comments of the thread.
http://www.troublefreepool.com/thre...-on-the-town-or-a-Winter-hunting-trip-anymore
EDIT: Also a lot of times the stuff is so fine that the vacuum when it hits it just sends it into a million dust particles back into the water so that's where the knee high or skimmer sock etc. will come in very handy.
I hope this helps. Have a wonderful night
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