Ok I am going nuts. Rain Rain and More rain. fine double cutting. Now it has finally dried some and I am starting to see stringers and still double cutting. I have checked the blades all new no rouded edges on tips and such. Checked air pressure. All correct. Mower is a Toro fixed deck 36". Have had it 1.5 years and cut great up untill recently. Any one have any ideas? I need to figure something out as I need the extra time from double cutting to catch up on shrubs and other work.