On your furniture, especially on your mattress microorganism can be found which are known as dermatophagoides. These organisms occur in moist areas and are potential allergens.
Therefore, Howdini always recommends checking whether your bed or mattress that you sleep on (home or hotel) has these microorganisms.
This video offers excellent tips and tricks by which you will recognize if the mattress has dermatophagoides and how you can get rid of them.