I wash all my fabric before I use it . I use a sheet of color catcher by shot and it does a wonderful job of any fabrics that want to run.
I know the problem of not knowing which fabrics that you have washed and haven't. So I have gone through all of the bins of fabric and serged the raw edges and then I washed and ironed and folded on plastic fgolding boards.
Now it is easy for me to sort all the fabric out.
I have to admit it was a heck alot of work and I ended up with some killer back aches. Also the fabric that I haven't gotten to yet isn't serged yet.
I have decided none is going into my cabinet until this has been done. And so if I cut some off the end it will not be serged but it will be back in the cabinet.
Hopefully this will keep me organized.
kjym Kathy