Condensation means moisture got inside
The entry point may be a crown, crystal, pusher, gasket or damaged case surface. Finding and correcting that path matters along with repairing the movement.
Drying the outside does not stop corrosion inside the watch
Heat tricks can damage a watch and do not properly clean contaminated movement surfaces.
The sooner the better
Steel components, dial feet, hands and electronic circuits can deteriorate quickly. Prompt opening and assessment can reduce secondary damage.
Future water resistance depends on the case
After a moisture event, no original depth rating should be assumed. Seals, crown or tube condition, crystal fit and actual testing determine what can responsibly be represented.