Those pesky little creatures can get in EVERYTHING, even visitors luggage and they take them home. I saw a thing on TV where hotels are having real problems with them, they are in the walls, the furniture, carpet, EVERYTHING!!! One lady took them home in her luggage and they had to go in and completely strip the walls out and everything.

Back when I saw that report, they were nearly impossiable to get rid of. I never heard of this

If you look at the links on my post you will see that Ozone is a gas that is put out by this machine you rent or buy. If you use one that puts out Remediation strength that's in excess of 7200 mghr then I guarantee you
that after a day or two of running the machine in a closed room whatever is biting will be dead.
If that works, they have made big advances since the last I heard of them.

I would warn the visitors that you have them, could be bitten, and possiably having a bad reaction to them.