Most professional carpet cleaners use a psi setting of 100-400, but can go as high as 500 for a deeper clean. Delicate fabrics like nylon and cotton require a significantly low psi setting of only 50 to avoid damage to the carpet pile while still using enough pressure to suck up dust, dirt, and other particles.

Hot Water Extraction Otherwise known as steam cleaning, this is easily the most common professional carpet cleaning technique.

Using Vinegar to Clean Carpet is Not Effective While some websites sing the praises of vinegar as an all-purpose cleanser, it simply shouldn't be used on carpet. Here's why … Vinegar is great for countertops, but it's one of the least effective solutions out there for removing dirt from carpet fibers.