Hey. So i seriously messed up when washing my down feather mattress topper. Washed it for 3 hours on a 40 degree setting with normal laundry detergent (first mistake) and then have been drying it for about 3 hours in the tumble dryer on a high heat setting (second mistake) and it still isn't dry and the feathers in each square of the toppers have clumped up together. Please can somebody advise on how I can rectify this!