I got a mattress delivered on the 5th December, I noticed when I flipped and rotated the mattress in April, that there was a blue mark on one side and a grey mark on the other. I phoned Dreams but because of Covid I had to wait til July for someone to come out to inspect my mattress. Got a technician sent from Homeserve who said the grey mark was finger prints and the blue mark was dye transfer, he said these marks are possiblity due to accidental damage. To me the blue mark looks like mold. My hands are always clean before I make or change my bed, I always use a mattress protector. My mattress is now going lumpy and causing me to have a sore back. I'm now going to have to buy a new mattress. I wouldn't advise anyone to buy from Dreams.