Shouldn't matter depends on color pretty much, i normaly wash mine after every work out or have back ups but if you want to do it weekly just wash them how you would wash cloths that are the same color and as for hanging or dryer the only thing that I don't do is throw my work out cloths in the dryer cause the heat eventually wears the color out and it looks rough I normally hang them to dry then once completely dry I then throw them in th dryer but on air dry only hope it helps