Steaming them with a kettle of boiling water seems to fix them 90% of the time, for me at least. It really is quite magical to see the fletching recover it’s original shape. Just need to set the arrow up somewhere to dry again afterwards and the jobsagoodun.Feathers are not meant to get wet, which is why birds spend a lot of time grooming to keep the shape and spread the oils through them.
A feather that gets thoroughly soaked may not go back into its proper shape when dry.
What I meant was that in my experience wet fletchings act like no fletchings so a well tuned tested bareshaft arrow will minimise the affect of wet fletchings.I don't tune arrows with wet fletches. So it is quite probable that 'wet' and/or misshapen feathers will influence how arrows fly!