So I started off wet shaving with a Merkur HD , got decent shaves for a bit and then started again with the bumps and ingrowns. Moved onto an Atra and got great shaves consistently and no bump or ingrowns what so ever. I figured last week what the hell, got a feather portable which is suppose to be aggressive with a feather blade and after one shave I got the ingrowns and bumps again. I keep reading the more aggressive blades lead to less passes and less ingrowns and irritation. What gives?