(Image credit: Kohl's / Amazon / Brooklinen / Saatva) We're all guilty of utilizing our under-the-bed storage for old, unused or forgotten items, but this (in theory) harmless habit could cost you precious hours of sleep . "Under the bed is a prime site for dust to accumulate. Skin cells, fibres from bedding and pet dander also gravitate to the floor and waft under the bed," says Dr. Deborah Lee, medical writer at Dr Fox Online Pharmacy . Key takeaways: At a glance Prime site for dust: It's easy for dust, debris and pests to accumulate under the bed. Allergic reactions: The breeding of pests and dust mites under the bed can cause respiratory issues, skin problems, and disrupted sleep quality. Biggest mistake: Out of the 7 common things stored under the bed, cardboard is the worst when it comes to pests. Musty, humid conditions: Most materials like clothes, paper, shoes and leather provide the right environment for pests to hide and thrive.…