If have ridden salt encrusted roads on your trusty bicycle for the last six months you need to give your bottom bracket some love. It will have suffered greatly after this treatment so re-greasing it now if you’ve not done it already means it will be around for a few winters to come.
So this weekend pull the cranks, remove your bottom bracket, give it all a good clean, grease it up and re-install. While your down there do the same to chain ring bolts and pedals.
A clean and greasy bike is a happy bike.
Remember boil your bidons and keep it rubber side down.
Hope this helps.