★★★★★
You're right. The cotton ball soaked in alcohol and bandaged has worked for me several times also.
Rubbing Alcohol
★★★★★
As soon as you feel a boil developing, it helps to swab the area with rubbing alcohol. Once it is already basically formed, soak a cotton ball in rubbing alcohol and tape it to the boil using a bandaid. Do this until the boil is dried out. Also make sure to change the cotton ball at least twice a day. This has helped me several times. Good luck!