Bugs and Insects again

I searched past messages, and see that generally mesh or screens are discouraged as affecting the airflow. But, recently I discovered that my PA II flex had been down for weeks because I did not know that one side was saturating at full scale. On taking it down, a relatively small spider came out, just a bit larger than an ant. I then carefully disassembled it, wiped and vacuumed other webs and dead bugs out. I think? it is back to working now, probably takes a week or two for the statistics to get back to normal. From 34% A/B comparison, I’m back up to 64% after about 10 hours (was always 100% before). I guess my graph will be a mess for a couple of weeks or more. So, a few questions:

Is it okay to vacuum through the holes in the laser particle sensors?
Is there a way to get an email or SMS notification if confidence % falls off in the sensor A/B comparisons?
Is there a way to clean up or delete the saturated data on the graph after a spider intrusion event?

Yes, the procedure is described here: