Still can't shrink clothes - what am i doing wrong?

Check the label first. Heat only shrinks fibres that can shrink - cotton, wool and rayon will, polyester and most poly blends barely move. If it's mostly synthetic you're fighting the fabric, not doing it wrong. For cotton: hottest wash the label allows, then straight into the dryer on high for a full cycle. Wool shrinks from heat plus agitation, so a hot wash with lots of movement does more than the dryer alone. Do it in stages and check in between, there's no going back once it's too small.