Greig Spence scored twice as Cowdenbeath eased to a 3-0 Ladbrokes League One victory over Airdrie United at Central Park.Declan Hughes headed an early effort wide for Cowdenbeath before at the other end Bryan Prunty shot straight at Jamie Sneddon.And right on the stroke of half-time the Blue Brazil went ahead when Spence latched onto Dean Brett's cross to head past Neil Parry.Andy Murdoch doubled the lead after an hour when his shot from just outside the box flew past Parry.Spence then made the game safe 20 minutes from time when he was again found by Brett and fired his effort into the net.