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Whey can be used in breads/biscuits. We use our yogurt whey this way. You can also make ricotta cheese with it.

Check the beekeeping supply stores for straining material,used for honey. It's sold by the yard and can be folded to strain looser or more thoroughly. I use three layers for yoghurt and two for butter; great for jelly. Easily washed and dried, no musty odors or staining. Before I found this I used my trusty sackcloth towels and boiled them with a bit of TSP to clean and deodorize them. Dadant, Brushy Mountain are some of them

For super greasy fabric try boiling with a little TSP in the water. Rinse really well.