We like ‘sealing in an airtight bag such as a Vacuum Sealed bag or tightly tied trash bag for 14 days’ the best. (We realized this is not always prudent as parents need to use the car seats.) Then vacuum out the top and bottom layers of all fabric to assure that as many of the eggs are gone as possible.
According to the NPA, vacuuming is the safest way to remove lice and fallen hairs with attached nits from upholstered furniture, rugs, stuffed animals, or car seats — wherever someone with head lice may have rested their head.
For items that cannot be soaked in hot water such as headsets or helmets or the RideSafer, it is recommended to place them in a tightly sealed plastic bag and put them in a freezer for 10-12 hours to kill the lice and eggs.
The RideSafer cannot be washed in hot water. It will damage the flame retardant properties and may shrink some of the fabric pieces. IMMI prohibits machine washing and using dryers for the buckles on the older models because of the agitation and spin cycles.