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Dry
chemical cleaning or dry extraction is the carpet cleaning
method involving the least amount of moisture (hence the
name). This method involves applying a dry
extraction compound that is usually partially moistened with a
detergent. It is then spread over the carpet and worked in
with a brush. After the compound has been worked in it is
vacuumed out, along with the dirt.
A
pro to this method is that there is no chance of over-wetting
the carpet. This results in minimal drying time (for any type of
cleaning there is always some moisture needed and as such there
is a drying time).
Some
cons to this method are that the compounds used are usually
laced with compounds which aren't environmentally friendly but
are needed to extract the dirt. Also the chemicals are
difficult to vacuum out and as such leave a residue in the
carpet. The compounds used in this method are also very
expensive (sometimes up to 30% of the job cost!).
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