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I have found that the easiest way to make a zipper work smoothly is to rub a cake of soap (any kind) along the zipper edges. That zipper with go up and down smoothly.
By Mary from MI
For those clothing items where the fabric always seems to catch in the zipper; try this fix.
Safe as any glue gun project
Can be redone over and over. Do not overlap reglue second passes.
You can fix a stuck zipper by running a candle up and down on the teeth of the zipper. You should then be able to slide it the back and forth easier.
By Gerique from Cleveland, Ohio
There is nothing more frustrating than something needing a zipper fix when the clothing is still wearable. I hate doing zippers in clothing. TADA! Found a fairly inexpensive idea - better than throwing away and buying new.
Most dry cleaners have a tailor or repair section. Prices may vary slightly. I sent in a good men's heavy Carhart winter jacket to have a new zipper done, $20. That was in my price range, knowing my frustration in doing it and replacing it at over $100. Picked it up and it was only $6. Found out, most items such as coats, etc. just need the little metal clip changed out, not the whole zipper.
For me to buy the zipper needed at the sewing shop would be close to $10. The $6 was cheap, and a total zipper being $20. It still would be $10 for labor. I have only taken jackets, kids coats, etc. in and they all ended up with the only the clip replaced! Cheaper than throwing away something usable.
By Joyce N. from Benson, MN
If your zipper is stuck, use a graphite pencil along the teeth back and front and, presto, it works again!
By shi 
To fix a stuck zipper, rub up and down the zipper with bee's wax. I don't know where I got this idea, but it works like a charm!
By Virginia B. from Charles City, IA
Carefully spray the zipper with Pam being careful not to get it on any material of the garment. I tape a strip of Saran Wrap beside the zipper prior to using the Pam. Good luck.
By Elayne from Dalhousie, Nova Scotia
To unstick zippers, I have always used a bar of soap or crayon. If that does not work, use a wax like a candle.
By Joann from Pawpaw, WV
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Here are questions related to Fixing a Stuck Zipper.
What are some good ways to get a zipper unstuck? Thanks!
By Nancy from Longview, TX
By Becca J 07/24/2010
If you are out some place and your zipper gets stuck, rub a tiny bit of lip balm on the teeth of the zipper (open and closed) above and below the zipper glide. Gently rub the balm into the teeth with your fingers. Then gently tug and wiggle the zipper pull up and down toward this greased area. Unlike other solutions, the lip balm should not stain your clothes and can be done easily at home or on the road.
I have a zipper that sticks all the time. What can I do with it to make it better?
By Toybox45 from Glasgow
Run a bar of soap over it then work zipper up and down to work it in.
Do you have zippers that don't operate smoothly? To make a zipper slide better, rub a bar of soap over the teeth.
By Brenda Cole
By Gail 02/15/2009
As long as your careful and only touch the metal zipper when it's done up, I always use the WD40 pen. Sounds really awful and stinky but, it's so handy to have this around the house for things like this. If I use this method to unstick a stuck zipper, I always make sure to put paper towel behind where I'm working, (folded up in case I go a little nuts) to soak up any excess and make sure I'm ready to go. And the great thing about this method is that it's completely colourless and the pens are pretty much scent-free.
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If you have a sticky zipper on a piece of clothing, try rubbing the zipper with a pencil. The graphite in the pencil should help lubricate the zipper. A bar of soap also can be effective.
By T&T Grandma