13-2/35 Removal of Dew or Frost
Except on the teeing ground, the removal of dew or frost from the area immediately behind or to the side of a player's ball is not permitted. Such action is deemed to improve the position or lie of the ball or the area of the player's intended swing and is a breach of Rule 13-2, unless it occurs incidentally to some other action permitted under the Rules, such as in addressing the ball or removing loose impediments.
Additionally, the removal of dew or frost from the player's line of play or line of putt is not permitted. Such action is deemed to improve the line and is a breach of Rule 13-2 or, on the putting green, Rule 16-1a, unless it occurs incidentally to some other action permitted under the Rules, such as in removing loose impediments, repairing ball marks on the putting green or addressing the ball. (Revised)