don't bother boiling it; it reeks up the house to a raunchy degree and is not entirely effective. If you don't have access to a headshop to acquire formula 420 or orange chronic or other cleaners, just take some rubbing alcohol and uncooked rice (for friction). Put equal parts of both into the utensil and swirl it around, get the motion of the rice to cover all of the inside of the pipe. Usually just a couple minutes, depending on how dirty the piece is

edit: oops, didn't realize you said you didn't have rubbing alcohol till now. Um..get some.