If they are going to children, they are probably washed before given to the children. I make charity quilts for a hospice and they wash them all before giving to the patients. Check with the organization you donate to. If they are washing them, there's no need for you to wash them. Sometimes, with glue basting, you can feel a little hard spot, before washing, but if you keep your glue in real thin lines, you really cannot tell they are glue basted before washing.