i would buy a mesh lingerie bag and put the pieces in it.
then i would soak rhem in very hot water in a sink, large kettle, or bucket for at least an hour. ( like colors together - just in case there is a bleeder.)
i would rinse them.
my dryer will let me start at the spin cycle - so i would spin them
i have a drying rack - and would hsng the pieces on that.
there should be min8mal raveling doing it that way.
it is a bit of a bother to wash little bits of fabric - but i actively dislike unpleasant surprises.
i also prefer to get most of the shrinkage out of the way because i prefer a flatter look.