Do not use supermarket “Oxy action” (hydrogen Peroxide of unspecified %) or Chlorox/Chlorine bleach based Chemicals on wool carpet, no matter how white you think the wool is. Doing so will always take what little die was applied to the fiber and leave you with something like this..
The Problem here is you had a spot like red wine for example that could have been removed. Now instead you have an area of the carpet that has had the dye either ruined or removed and the only option in this situation now is to dye the spot (can be successful and almost always better than the bleach mark, but may not be perfect) or cut it out and patch it.
Also try not to scrub wool carpets specially with stiff bristle brushes you are better off blotting the stain then preferably dilute with water and extract with a wet/dry vac and put something like baking powder on it so if the spot wicks back as it drys it does so into the baking powder and you can just vacuum it off the next day.
To much scrubbing will damage the fibers and make them fray this is more a problem on wool Berber but it’s not particularly great on cut pile either. at the end of the day the quicker you can react to a spill and sop it up the less chance there will be that there will be permanent damage. having your carpets scotch guarded at least every 2 years is a great idea also. As it gives you a larger window to clean up spills before damage occurs, it also has the added benefit of keeping your carpets cleaner for longer and increasing their life by reducing wear to the fibers from everyday foot traffic.
At Kane’s Steam Clean you can rest assured that we use wool safe cleaning agents and a gentle but very effective process to professionally clean your natural fiber carpets and area rugs.