According to IICRC, Institute of Inspection Cleaning and Restoration Certification, frequently used carpet should be professionally cleaned by a qualified technician at least once a year - perhaps a little longer interval for infrequently used carpet and even sooner for carpet in homes occupied by respiratory sensitive or allergic persons or in homes with indoor pets.
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CBC Cleaning and Restoration, Inc
Santa Clarita, CA,91355,US
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(661) 294-2221
(818) 709-4661
(805) 530-1900