how to get rid of bedbugs in a mattress
Video begins at heating the water for the yeast sugar mixture, very important:
*The CO2 created from Yeast is non-toxic, it's not the same as car exhaust. In order for these traps to work efficiently there must first be a barrier created between the person and the bug, to fool the bug into thinking the CO2 is a human. Effective barriers can be a sheets of plastic placed under on or around one's bedding, as these bugs cannot climb uphill on sheets of plastic, and will often get stuck unable to walk and pretend to be dead. Squish or spray with alcohol. Keep all plastic sheeting away from unsupervised children.

This is how to create bed bug traps basically for free, with common trash and household products:

EACH BED BUG TRAP LIST:
1. used clean large margarine like container,
2. empty small water bottle 9 oz. (with lid)
3. used paper towels, fabric or other paper will work too.
4. 1 packet of yeast.
5. 1/4 Cup sugar
6. about 7oz of warm water (baby bottle temp)
7. scotch tape, or duck, or masking tape will do.
8. aluminum foil about 12"x12" or plastic can be used.
9. scissors, to make holes on water bottle lid.

BARRIER LIST:
1. Painters plastic drop plastics, or white trash bags (the black trash bags will work too, but its much harder to see the individual trapped bugs on the plastic, especially when it is used on as a floor liner.
2. thumb tacks, duck tape, scotch tape or masking tape will do to secure to create layers on plastic to cover chairs and beds.

PLEASE NOTE* The traps will be in-effective without first creating a barrier between the humans family and the bed bug families, to do that one must line floors, under beds, under tables, under chairs, on top of walls, beds, chairs, with preferable painters plastic drop sheets, but white trash bags duck taped together overlapping will work. Over lap plastic sheets/bags several layers, then add bedding or seat covers that are clean, inspected closely, spay 91% Isopropyl on any live bug one sees and it will die. Depending on infestation, traps created, the time it can take can be as long as 6 months, in an apt, where other units are not treated, the plastic should remain in place. Keep plastic away from inside of cribs, clean cribs real good with the 91% alcohol in creases especially and place crib on top of plastic only and apply Vaseline to the legs, just in case. And place traps every where, and also place plastic liners under dog and cat resting areas, under other mammal cage like hamsters. Place plastic under computer, under keyboard, under mouse pad, under officer chair, under feet everywhere. Supervise children closely!

PLACEMENT OF TRAPS* because the bugs have a hard time walking on the soft plastic with many inclines, they often will tire, and stay in one spot and appear dead, spray them with the 91% Alcohol, place traps under the plastic that is covering the bed, desk, recliner, office chair, and also in other areas of the home, because these creatures can reportedly travel 500 feet for a meal, and often live in the walls, so a trap below a light switch may be a good location, or an electrical plug.

BE PATIENT* it can take 3 to 6 months to kill the babies, but the adults and eggs according to some reports can survive much longer like a whole year without feeding. One must inspect traps daily, empty and re-set as needed, if no bugs found in traps search for weaknesses traps, or in plastic layout as often it will tear or shift. Inspect family make sure no one is getting bitten usually on exposed skin as they sleep, but can be bitten during the day too. Some family members might not get bitten at all, while others will and might be allergic if areas are very swollen and painful, and that family member will need to be seen by a doctor for strong antibiotics, others the bites will not be annoying but evidence of the bites will be there as red small round marks, the classic bed bug bites is like a pattern that forms a triangle, sometimes one's whole back can be covered in bites and one will not know it. Inspect linen for blood spots, there should be none after placement of the layers of plastic, if there is then there is an opening somewhere, also look to the ceiling, light fixtures, tack thumb tacks with plastic to create a tent like shield, they are very smart animals, that's why the more traps the better. They can climb straight up a wall, but not up plastic trash bags, or other similar plastics. Keep children away from plastics, add a carpet on top of the plastics on the floor that is clean so that children and pets don't accidentally fall or suffocate, supervise children diligently.
See for more info. http://www.killbedbugsfree.com/