I have posted on this issue before -- so I'll try to keep this short -- it is not the smell of the spray (505?) -- it's the chemicals -- I have had emergency hospitalization or ER Treatments due to the chemicals in various sprays -- Yes, I have asthma. If it works for you, fine -- I won't try to persuade you otherwise. But, even scented hand sanitizers stir up my asthma, so I don't risk that. I am very careful with my pin basting and have had no problem with puckers, etc. I would never criticize what anyone else does -- you have to do what works for you. But respiratory problems are very serious -- tobacco smoke even outside precipitates asthma reaction -- I carry an emergency inhaler in my pocket at all times. Given that, it would be stupid for me to risk spray basting. As long as the chemicals don't bother you, it's probably your "go-to" method. For me, I prefer to avoid asthma attacks -- they are dangerous and not pleasant at all, and the emergency rooms are extremely expensive!