Please choose the correct ending to complete the given sentence: Health: [header] How to make your bedroom hypoallergenic [title] Purge allergens from your sheets. [step] Your bed is an allergen hotspot. This is because bedding uses material like feathers and because the bed itself is a haven for dust mites, microscopic creatures that feed on dead skin cells and whose feces and dead bodies cause allergic reactions like coughing and a runny nose.

Ending1: [substeps] The dryer your sheets and mattress, the more allergens you can get into your bed. Drying out your sheets and pillows puts a lot of stress on them. Ending2: Be sure to secure your bed from these allergy sources. [substeps] Encase your pillows, bed, and box-springs in allergy-proof plastic or knit covers. Ending3: Release pet dander and cobwebs from the bed itself. This will make your bed habitable, especially by eliminating allergens. Ending4: [substeps] Don't use linen, cotton, or other fabrics in your bedroom. Use covers or like cloth, corrugated plastic or towels.

Answer format: ending1/ending2/ending3/ending4