The dreaded bed bugs..Yes, hosting community, it’s the dreaded “B” word
I found this article on bed bugs by the hosting journey very useful - How to Get Rid Of Bed Bugs: A Complete Guide For Your Airbnb
In summary prevention is better than cure.
It is recommended to purchase sealed, zipped bed bug mattress covers for all beds. The best I have sourced are from the Bed Bug Barrier co they range from $39 - $69 depending on size requirements.
Mop floors with Pine sol solution once per week (especially corners).
Spread a thin dust of Diatomaceous Earth, pesticide grade (not pool grade). Wear a dust mask, as it can be harmful if breathed in or even when it comes in contact with skin or eyes.
Use a pine oil based spray on mattresses.
Getting an exterminator in can cost hundreds of dollars per treatment, and ideally a last resort!