Should I dress or let my wound air after breast reduction op.? (photos)

I had uplift and breast reduction op. Almost 4 weeks ago. 5 days ago the inscison opened up and Is quite large, i have been dressing it with gauzes and keeping it clean but it is not drying out and is wet and oozing a little. I have read lots on airing wounds so it will form a scab quicker,,problem is Iam in a hot country and am sweating a bit, do I dress this wound or let it air??