It was a great Euro. trip, but the youth hostel in Amsterdam happened to have bed bugs.
What did they do when they got home?
Sauna!
And not just sauna, but all their clothes and luggage were able to enjoy a nice long hot round (no cold plunge needed).
Heat penetrates into small crevices that cannot be inspected. Lethal temperatures for bed bugs range from 117 degrees Fahrenheit to 122 F. The walls of hot boxes reach a higher temperature than the suggested lethal range in order to permeate belongings placed within, killing all bed bugs in all their stages.
terminix.com: heat-treatment-an-effective-way-to-get-rid-of-bed-bugs/