Alcohol mixs with water, thus making it good way to chase out excess water from threads etc. after one uses a water based cleaner.
Even if you get the 100%, the alcohol will pick up a little water vapor from the air while you are using it (side note Everclear is 190 proof or 95% as this is about lowest boiling point for water and grain alcohol ... also better to drink vs cleaning optics etc. due to the residue which it leaves ...;-).
While alcohol will burn, is is safer than many other solvents (i.e. brake cleaner with acetone).
I like warming parts (at work we bake the lab equipment to drive off the last of the solvent) and if one is in a hurry can also chase the alcohol with another solvent to speed the process (alcohols tend to dry a little slower than many other solvents).
Regards
John