An overfull or old clogged bag will not capture dust as effectively.
Vacuum cleaner blowing out dust.
While the simple answer is that if your wet dry vac is blowing dust into the room it typically means there is an issue with the filter and it needs to be investigated.
Check to see that your bag is reasonably fresh empty.
If an upright cleaner is spitting everything out it means that the brush roller is ejecting everything.
Sometimes the belt on a vacuum cleaner eventually cracks or splits causing the vacuum to lose suction which can cause dirt to blow back out of the unit during use.
To fix a clog in the hose feed one end into a garbage bag and poke the other end with the back of a mop pole until you push the clog material out into the garbage bag.
If a vacuum cleaner draws air in it must also blow air back out.
It sounds like your bissell has this and he flipped these around so that it s now pulling through the filter and blowing out the power head.
But yours might not be filtering air correctly.
Although the filters should deal with it a torn vacuum cleaner bag will also allow the dirt and dust to simply blow through the machine.
To investigate disconnect power and lower the cleaner head then turn the vacuum cleaner over and remove the belt cover on the cleaning head.
Typically when sucking up the water you won t ever have an issue with blowing dust back into the room so we ll scratch that out as an issue right away.
Pull as much of it out as you can and discard.
There are two ways this can happen.
Also check the seal that seats the bag and make sure it s well connected.
Australian researchers tested 21 vacuum cleaners from 11.
Some vacuums have hoses that connect to the blower motor one for inlet one for outlet.