I've been collecting heads seperate to tails on my spirit runs, I reuse the tails regularly when I have another spirit run to do and didn't really notice I as getting more tails at the end when doing this. But when I reuse heads I feel like I just get more heads when doing the spirit run, kind of felt like it was wasting time putting heads back in.
What are other peoples experience with heads, do you reuse them or dispose?
I have too many bottles full of them and only so many windows to clean.