I used to use 99% alcohol, however, the extra cleaning solutions they have in the cans really help when fixing small things like a scroll for a gaming mouse or a button. the solution coming in an aerosol allows the solution to get in the nooks and crannies and helps gets the dirt out of places it shouldn't be in.DNA wroteAm not sure why you don't use 95%+ preferably 99% alcohol most contact cleaners are mainly alcohol with an aerosol.
I personally have a $50 Logitech M535 Bluetooth mouse that has a problem with the horizontal clicks as well as the scroll wheel, I tried to fix it with alcohol and it did nothing, then I grabbed the contact cleaner spray from work and it worked like magic!