Thank you Greenock, Freezing can work but & it's a BIG BUT it needs to be done at least twice with a day or more's break between each session which should last for several days.
A 20/30 second belt in the micro-wave works fine however it again should be done twice with a new & clean bag used afterwards for storage.
Various crystals are okay, but they smell terrible, some are carcinogenic & the effect can go off if they fall away, not to mention what the crystals might do if they got ingested by a pet/young child etc.
Better still is to use a repellent spray all over the materials, there are 1000's of them available on the net, try a quick google for them.
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