I have an SWG, which is absolutely great for normal pool use, but can "fall behind" when the bather load gets really heavy or after a large rainfall/windstorm dumps lots of stuff in the water. I have 2 strategies to deal with this:

1) Anticipation. When I know that I am going to have a large bather load, say a birthday party for my 10 year old, I up the SWG output (on my Aquarite, I will go from 35% to 55% or so) several hours before the party and leave it up until the following day. This kicks the CL level up a bit, but not too much before the "load" hits. This has really worked well for me.

2) Post problem bleach. The few times I have gotten a cloudy pool, instead of super-chlorinating with the SWG, I hit the pool with a couple of gallons of bleach AND turn up the SWG for about 24 hours. This seems to be the most effective way of quickly clearing up problems.