WHAT YOU NEED:
1 litre of white Vinegar mixed 50/50 with water
1 litre of 10 vol (maximum) of Hydrogen Peroxide
1 squirt of mild dishwashing liquid
1 Pot of Sodium Bicarbonate
Nail or Scrubbing Brush.
- If the area is still wet blot as much as possible immediately and soak area with a solution of 50/50 White Vinegar and water - right down into the carpet until the backing is also soaked. Blot again until as dry as possible but still damp.
- Sprinkle a handful of Sodium Bicarbonate ( Sodium Hydrogen Carbonate) over the patch.
- Make up a mixture of 10 vol Hydrogen Peroxide (no stronger than this) and add a squirt of Mild Dishwashing liquid - enough to spray over the stain.
- Spray this mixture of Hydrogen peroxide and F... Liquid over the handful of Sodium Bicarbonate and work into the stain with a stiff brush. Scrubbing Brush or even Nail Brush will do.
- You can then allow the area to dry completely.
- Hoover up the remnants of the Sodium Bicarbonate!
What I strongly suggest is that you then take the opportunity to Deep Clean and steam the carpets otherwise you will find that there is a super clean and odour free spot or spots on the carpet and the rest remains dirty by comparison. Finish by getting a professional - such as Lily & Fitch - to 'Scotch-guard' the carpet, which helps to protect further urine penetrating the fibres. Logical really!
Finally. If you have left it too late to prevent this behaviour, it might be worth trying to put your dog into a crate with warm bedding when he is left alone - he won't urinate on his bed. Immediately on your return, let him out and reward him when he urinates outside. Obviously, if you have an old dog that finds bladder control difficult it is probably better to keep him in an area which is easily washed when you are not around
Caution/Disclaimer: It is highly recommended that you spot test a small area with the Peroxide mixture first. Do not use a higher concentration than 3% or 10 vols. Bleaching may occur on some carpets with a stronger solution. Read the label on the Hydrogen Peroxide Carefully. The label will state the strength.
The Science Behind the stain:
Pet urine can cause permanent damage to your floors and fabrics. It can also create an unhealthy indoor environment. When urine is first deposited onto a floor or fabric, it has a pH of about 4 or 5, which is on the acid side of the pH Scale. It is easier to remove right then when it is fresh. Once it dries it turns “alkaline” or to a high pH between 10 to 12 on the scale and it becomes more difficult to remove. The warm acid state of the urine offers a perfect breeding ground for bacteria, which begin to flourish almost immediately. In this original acid state the urine begins to oxidise and react with the carpet to create a colour change, which will become permanent if the urine is not removed immediately. Some of this colour change can be attributed to the strong ammonia that forms as the urine passes through bacterial and chemical change. If left for days or weeks, depending on the fabric or floor type, it will change the dye structure, therefore causing permanent staining. Even if the soluble deposits are removed, the damage to the dye structure may already be done.
There are two sources of odours associated with urine.
The first comes from bacteria that grow abundantly in dark warm places with a never-ending food source. A pet can feed the bacteria daily! This bacteria growth and breakdown of the urine creates amino acids. These complex organic compounds will often work deep into the fibres to a point of becoming part of the fibre. This can present a challenging situation. The waste materials and gases from the decomposing urine create an unpleasant odour. When dried urine is remoistened, it gives off an ammonia gas. If smelled once it is seldom forgotten.
The second source of odour is chemical, that is present even when the bacteria have been killed. This explains the reason that more than sanitizing is necessary to neutralize odours from urine. Urine also presents additional odour problems when the relative humidity is high. The salts and crystals that are left behind as the urine dries are hydrophilic and draw water to them. Dried urine is often easy to smell in the humid months because the salts attract the moisture, the moisture evaporates putting out a greater proportion of odorous ammonia gas. You must get rid of the urine salts in and under the carpet to get rid of the odour.