thunderchicken
Grandmaster
No, it should be one treatment that takes less than 12 hours.
Don't bother with chemical remediation. You want heat.
I have had two different friends of the family who have had to deal with them. One apparently had a pretty nasty infestation and the exterminators had to do the heat thing to get rid of them. The other had a kid whose school had an infestation and so they were actively inspecting for a few weeks and found them on a bed really quickly. They called an exterminator and they ended up doing chemical treatments. I think it was every 2-3 weeks for about two months. But he said it took care of them really fast. So my speculation is that it depends on how large and wide spread the infestation is.
Seems to be a potential problem anywhere people gather.
I am a co- facilities director at the church I belong to. So a few years ago I was responsible for setting up an account with an exterminator as a precautionary measure for our food pantry. As a result I have had some interesting conversations and have been shown what to look for. We try to insepct once a month to stay ahead of any pest issues