What is the best way to keep my mattress topper fresh? Rebecca L December 02, 2019 17:17 Updated Follow Pull back the covers every day allowing your bed to air, letting the fibres breathe and moisture to evaporate. Related articles How should I clean my mattress topper? How can I protect my mattress topper from spills and stains? What should I do if my mattress topper filling starts clumping together? Are all mattress toppers deep? What size mattress topper should you get if you have a king size bed? Comments 0 comments Please sign in to leave a comment.