lurve warmth) blankets under our comforter. We have covers on our mattresses/pillows and have an anti allergen duvet so I think the culprit is our heavy winter blanket (please please fit in the washing machine!) and mass reproduction due to the added heat. Plus even if it's the wrong environment for the mites or if you kill them with high temps or sunlight, their pellets (doo doo) are the main source of allergen so "Lucy, you have some cleaning to do!!". Nasty.
Wish me luck. And give me tips if you have any!! This. means. war.
ETA: That blanket did NOT fit in the washer. Had to wash in in the bathtub then run it through a couple spin cycles but it is clean as can be. Easily weighed a hundred pounds - giving new meaning to the term "wet blanket". Sheesh. Did my darnedest on those mites so I'm crossing fingers for a better night's sleep and the ability for Jack to breathe in the morning.