I knew it had somethig to do with an iron and a paper bag - but i could't remember what..
an iron and a paper towel
http://nhnh.essortment.com/removewaxfrom_rflp.htm
Everybody loves candles these days. Whether you use them for atmosphere, aromatherapy, or as a fragrant compliment to the holiday season, candles provide a note of welcome and comfort any occasion. Unfortunately, accidents sometimes happen with dripping wax. To prevent wax spills in the first place, you can purchase glass discs that fit over tapers. But if the spill has already occurred, here is a quick and easy method for removing wax from candles and fabrics without harming them.
You will need paper towels and an electric iron. I recommend a very absorbent paper towel for the best results. Use white towels only as dyes may bleed onto the carpet when exposed to the heat of the iron.
Before beginning the procedure, use a brush or your hands to pick away at any of the excess wax that you can get out of the carpet fiber. Be gentle and be careful not to unravel the pile when brushing.
1. Plug the iron in and turn it on to the lowest setting possible.
2. After the iron heats up, take a paper towel and place it over the wax. Gently apply the warm iron to the paper towel. The wax should begin to liquefy and the paper towel will absorb it. Do not set the temperature of the iron any higher than the warm setting, or you may harm synthetic fibers. For berber or some sculptured carpets, you may have to press down harder with the iron. Be especially careful with the berbers and do not pull on any fibers or loops. Pulling on those loops can cause a "run" much like the runs in panty hose and can ruin the rug, as the run will travel across the length of the carpet.
3. Continue working the iron and paper towel until all of the wax is absorbed. You may need to turn the paper towel several times as the area where the wax is being absorbed becomes saturated. If it is a large spill you may need more than one paper towel. The watch word here is patience, as working this process can take time.
This method should work effectively. In cases of very stubborn spills, you may come to a point in the procedure where you have absorbed all of the wax you can and find that there is still some residue in the carpet. Try to gently pick out as much of the remainder as you can. It may help to apply an ice cube to the stain and re-harden the melted wax. Caution is advised here too, as some dyes may fade when water is applied. Check with your manufacturer if in doubt.
If you have tried all the above steps and you still have some wax in your carpet you may wish to call a professional carpet cleaning company. Choose a reputable company as most carpet cleaning services that advertise in mailers or have "specials" do not train their personnel to handle such a job and they may make a bigger mess than the one you began with.
Happy cleaning!