Domenic Alberga, Reid Boucher, Anthony DeAngelo, Ryan Spooner and Justice Dundas all scored for Sarnia (30-21-2-5), which moved two points up on Owen Sound for fourth place in the Western Conference with the win.
Jaroslav Pavelka made 29 saves in a losing cause for Windsor (25-28-4-2).
Wins by both Sault Ste Marie and Guelph further muddied the race for the final two playoff spots. The Greyhounds are now just two points back of the Spitfires for seventh in the conference, and the Storm are just three back with three games in hand.
Trailing 1-0 in the second period, the Spits were awarded a 90-second, 5-on-3 advantage when Tyler J Brown was given a five-minute major penalty and a game misconduct for hitting Kerby Rychel from behind. But the Spits couldn't tie the game and threatened on only a few occassions over the final 20 minutes.
Boucher banked one off Pavelka and in to make it 2-0 Sting just 1:55 into the third period. DeAngelo supplied the dagger, weaving his way through the Windsor defensive zone before beating Pavelka with a backhander high, making it 3-0 at 8:05.
Spooner's 26th came on the power play at 12:13, before Dundas scored a meaningless goal - his first in OHL goal - with the game out of reach at 18:32.
The Spits are off Saturday, before hosting the Sudbury Wolves Sunday afternoon at 2:05.
SCORING
FIRST PERIOD:
SAR ALBERGA (14) (NIKANDROV, BROWN) 13:48
SECOND PERIOD:
NO SCORING
THIRD PERIOD:
SAR BOUCHER (24) (SARAULT) 1:55,
SAR DEANGELO (5) (LUCIANI, BOUCHER) 8:05,
SAR SPOONER (26) (THOMPSON, MURPHY) 12:13 PP,
SAR DUNDAS (1) (THOMAS) 18:32
SHOTS:
WSR 9 - 12 - 7 = 28
SAR 8 - 10 - 16 = 34
PPS:
WSR 0-FOR-5
SAR 1-FOR-4
