Fluid residue and rehydration can be a serious issue as highlighted by safetypee. A lot of work was done by the CAA 10 years ago following a number of elevator freezing incidents on the 146. It is worthwhile reviewing the CAA winter operations web site to refresh the memory on some of the hazards that are out there each winter.
De-Icing and Anti-Icing Fluid Cautions | Air Operations | Operations and Safety