My boots are absolutely fine if I am spending a day skiing off lifts and leave them in ski mode all day as long as I am careful to make sure that my heel is well back in the heel cup when I put them on.
However, if I have been skinning I often get numb toes, starting with my little toe and moving in.
I have very small feet - my boots should really be a mondo 22 but there are very few AT boots available that small so I have had to settle for a 22.5 liner in a 23 shell. I have worked with a boot fitter to make this work for me for downhill. I also have a very high instep.
I think what is happening is that if I settle my heels in the morning and ski downhill all day, my feet stay put. But if I am putting my boots in walk mode, loosening the cuffs and skinning my feet shift forward slightly and then I squash the nerves over the instep when I do my boots back up for the descent. I do try to re-seat my heels at transition but this isn't always possible if the snow is soft.
Has anyone had similar problems? Is there a homemade solution I can try? I am wondering if there is some way of keeping my feet still while skinning. While my experiences with boot fitters have been excellent, I would like to see if I can find a simple solution before I spend more cash.
I am also aware that the obvious solution is to buy boots that actually fit, but at the moment I am not aware of anything available smaller than I already have apart from the women's Atomic Backland but while they are smaller they are not a good shape for me.