How do the rest of you unshrink clothes?

Works on cotton and wool knits, not much on synthetics. Soak it for half an hour in lukewarm water with a good squirt of hair conditioner or baby shampoo - it relaxes the fibres. Squeeze, don't wring, roll it in a towel to get the water out, then gently stretch it back to size and dry it flat, re-stretching every so often while it dries.