Bonnet/Brush Cleaning for commercial carpet
Q. I have just purchased a dirt napper for cleaning carpets, it has 1-1/4" trim bristles outside rows and 5/16 trim bristles for the inside rows and a bonnet in the middle. I have never used one before and need the dos and don’ts of using this; should I wet the bonnet with solution or just spray it?
A. First of all, consult the carpet warranty and care instructions. Some carpet mills discourage the use of bonnet cleaning or processes that could distort the fiber or loosen seams. Secondly, many technicians prefer to reserve the process for a carpet pre-scrub operation, as it tends to be more aggressive than a single bonnet.
If you plan to pre-scrub or encapsulate with the spin device, I highly recommend a shower-feed tank. A manual spray system takes about 30% longer and inevitably leads to dry spots which the brush then grabs, and this could lead to fraying. When you start the machine, always trigger the shower-feed first to lubricate the brushes. You could dampen the bonnet first, but a pre-lube should do the job.
Another way to distribute the solution (to pre-lube the bonnet and brush) is to trigger the shower-feed tank and then immediately pull the machine back manually about 2” as you turn on the machine and trigger the feed a second time. Only heel the machine on extremely soiled spots.
As in all cases, running a dirty bonnet only tends to move the dirt around. Observe the foam level for each individual product to regulate the feed, so as not to over-saturate or dry-scrub the carpet. Replace bonnets frequently and don’t forget to introduce a regular hot water extraction process into the cleaning system.
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