I have experimented over the 20 years with various
brands of doe in heat scents.For some reason some work and some
dont. Some that seem to work for me are Tinks69, and scents from Wildlife Research. I did find that you get what you pay for. The cheaper brands dont seem to work very well.
I use cotton Q-Tips and dip the tips in the scent.
I then bend the tips in a V shape and place them on branches along scrape lines etc. Ive found that using just a little scent works
much better than alot. After hunting I place the q-tips in a 35mm filmcanister.