I would not change anything else. Let the scrubber ramp up without tweaking anything else. You should not need to force the scrubber to grow by changing something else not related to the scrubber, that is the last resort.
The general timeline for getting a screen to full maturity is 6-8 weeks, which means about 3 or 4 cleanings. You're right on track. Take a pic of the screen when you remove it before and after you clean it.
As far as getting pics of it when it's running, you might swipe something over the acrylic before taking the pic. like a pipe cleaner or a pencil with a piece of paper towel wrapped around it, something to clear the beaded water. but not a big deal, just helps you get a pic. The beaded water diffuses the light a bit which doesn't hurt