Do artificial smells on your fly turn fish off?

[Tids]

I have read a few articles lately that have talked about artificial smells on your fly that can send trout the other way. Deodorants, glues, fly floatants are a few items that have been listed. Has anyone noticed this? When I open my fly box I can sometimes smell the head cement and I question if so can the trout. Are there any tips or tricks or products you use to mask the smells when you tie your own flys?
[signature]