I have done the bicarbonate of soda and cider vinegar rinse routine (Bungalowbabe; I've never seen vinegar in a plastic bottle, only glass; it's amazing how many different products people have access to, isn't it?!) with great success. I did this for three years........
You've taken one step in the right direction Chris, with the reusable flannels, so give yourself a pat on the back.