PNGMK wrote:Don't let your FDW bring bedding or linen in.
(I see SMS beat me to it substantially, but I'll elaborate a bit.) That's one option, but I've never seen a FDW enter a place of employment without any fabric. If the critters are going to hitch a ride, they'll hitch a ride. If not on day one then eventually -- and with any house guest or resident.
So you need to know how to kill the critters -- and how to keep killing them. One option is to seal everything you want to disinfect in one or more airtight plastic bags and leave it/them outside in the sun for the afternoon -- or even in an unshaded, parked car. Interior temperatures will easily reach 49°C for a sustained period and get the job done. (You can use an opaque bag if you're concerned about color fading.) A clothes dryer, washing (at a sufficiently high temperature), freezing, and chemicals also work, but in Singapore our abundant sunshine, well applied, is the most economical and most environmentally friendly option.