I love spiral blades and can only offer what works for me. #1 I dont turn my project unless I have to. #2 I make cuts continuous and when I want to change directions I stop then move in new direction. #3 maintain a steady speed of cutting.
LOL, now, keep in mind I am pretty new at this so my giving you advice probably isnt the best thing, but I do love spiral blades and maybe what I think might help. Good luck on your project.