There are a few possibilities why the job didn't look perfect when you were done.
1. As mentioned above, the Procaps machine is a lightweight scrubber. It's OK - but not great. A Cimex, Scrub3, or Rotary with
FiberPlus pads would do better. The brush bristles on a lightweight cylindrical machine aren't able to do a whole lot for a cruddy CGD carpet.
2. Spraying encap detergents onto the carpet does not work as well as feeding it through a solution tank. You get much better control and can easily adjust the amount of product when you are feathering the solution trigger on a shampoo tank. Encap is a variation of the shampoo method - using improved polymeric detergents. This method is not as effective when the detergent gets sprayed down.
3. You may not have applied enough detergent. Or you may not have applied it evenly (on account of what I just mentioned in 2 above). With encap cleaning you just want to apply enough detergent to see a light whitening on the surface of the carpet. With Encap-Clean DS it's easy to gauge how much you're applying, because the detergent will produce a light white layer on the surface of the carpet when you've applied the right amount. (Be careful to avoid over-applying the detergent - more is not better). It's important that you apply the solution evenly. Consistent application of the detergent can't be stressed enough -
you really need even coverage.
4. Machine scrubbing technique can also factor into the results you're seeing. You generally want to make 2 or 3 passes in most cases (1 wet pass followed by 1 or 2 dry passes). On the dry passes you can apply just a touch more solution to keep the surface moist as you're scrubbing. Avoid over-wetting the carpet (generally speaking, you should average about 300 sq ft per gallon of mixed rtu solution). Depending on the soil conditions you'll want to make an extra scrubbing pass or two. Scrub slowly and evenly on your dry passes. And be sure to overlap your passes, so that your cleaning is performed evenly.
5. The carpet may be loaded with dry soil and crud at the backing of the fiber. To check for this, pry apart the tufts of fiber in the high traffic lanes and look down at the backing. Is it white? It should be white since latex backing is white. Or is it dark gray, or black? If the backing is loaded with soil, that means it has become impacted with soil. If the carpet has been neglected or if it receives insufficient dry soil management on a routine basis, the carpet can become loaded with soil down to the backing. If that's the case, it may require Pile Lifting, Deep HWE, followed with Encap Cleaning, and possibly some Post Bonneting. CGD carpets with deeply impacted soil can be a real pain to empty out, because the tightly compacted carpet tufts can lock the crud down at the base of the fiber, and it's next to impossible to dig/flush/clean it all out from the backing of the carpet. Heavily soil-impacted carpets can be a challenge to clean and wicking can occur too.
Hope this gives you some food for thought. Let us know how you make out with this one. And if you'd like to contact me directly my number is 800-330-1888 ext 301 or you can e-mail me at
rick@excellent-supply.com Wishing you success! Doing good encap work is really not that difficult, but like anything it takes a little practice to become familiar with what you're doing. As you get the feel for encapping and become a bit more experienced, you'll find the process is simple and it can help you to hit the ball out of the park on CGD carpeting!