1. The best fix by far is to throw it out and get a new one. Then you
can always fold back the outlet end and tie it closed, drill 1/16-inch
holes along the length and use it for watering something. I wouldn't
use any garden hose for veggies though because them Chinee rascals put
lead in everything.
2. If the old hose is still usable, you can cut it at the kink and put
a threaded insert on each end. Just be sure that the insert is the
right size and not from the 99-cents store. Get a metal one. Or if you
get plastic, buy 3-4 and take a radio with you so you can listen to the
baseball game to keep you calm while you are breaking one after another
or can't get one to stop leaking after working on it for 30 minutes.
3. They also make tube inserts that sometimes work. Or if you have
some copper tubing around that fits snug inside the hose, you can
connect with that with a couple of hose clamps.
4. And for the extry cheap feller not unlike myself... if the hose will
stay open at the kink when it's straight, fasten something to the hose
to act like a splint to keep that section from bending. Ideal is
another length of hose that will bend slightly, or the hose could kink
again near the ends of the splint.
5. After trying 2-4, go back to number 1.
------ A year later.....
Same hose. More kinks. Cut some little pieces off the end, cut down
the side, wrapped them around a couple of new kinks, and fastened in
place with hose mending tape. That tape really works great - it fuses
to itself. Took 10 minutes. Total cost $1 for the tape at the dollar
store. Used the same threaded adapater, except replaced the plastic
parts with a 50-cent hose clamp. 4 inches shorter, but no leaks or
kinks, ready for another year.