Well I have removed my wipers and cowl about a dozen times so it only take me about 15 minutes. When you remove the upper cowl you need to pull it gently forward because it clips to the bottom edge of the windscreen. Then to remove the lower cowl you first need to remove the headlights to gain access to 2 of the 4 retaining bolts.
The wipers fit on a tapered spline, remove the nuts and fold the wipers back to remove the tension and give them a wiggle and usually they pop right off without too much effort.
The wipers fit on a tapered spline, remove the nuts and fold the wipers back to remove the tension and give them a wiggle and usually they pop right off without too much effort.