never worked for me either. my prefered solution is either get very wet, or put waterproof trousers on, normal woollen socks and use waterproof hiking boots/shoes for the commute. I have added a section of under eleastic on my waterproof trousers and they never ride up, so the waterproofs always stay on the outside of my gortex lined boots - and for me, at least (and my OH) it works really well.