Method 2: Using water and detergent 

For a dry blood stain, you can mix liquid-dish-washing detergent with cold water to clean your carpet. To be clear, soak a clean, white piece of cloth in the solution, and then use it to apply the solution on your stained carpet. After that, you can gently scrub the stained area using a tooth brush before using a wet cloth to rinse and blot the area. 

Method 3: Using water and ammonia

Another effective way of removing blood stains from your carpet is by using a water and ammonia solution. But hey, never attempt to use this method on a woolen carpet. To get started, mix two tablespoons of ammonia with a glass of water. You can now use a spray bottle to apply the solution on your stained carpet, and then allow it to sit for 5 minutes. Next, use a clean piece of cloth to blot the spot. 

Method 4: Using salt paste

If you don't have any stain removal products to clean your blood-stained carpet, don't worry; just pour some cold water in a bowl, and then add in enough salt to create a thin paste. After that, you can apply the paste on the stained spot and then let it sit for at least 5 minutes. Now without rubbing, blot the stain until it's completely gone. 

Method 5: Using hydrogen peroxide

Lastly, you can use hydrogen peroxide to clean your blood-stained carpet and leave it spotless. For this method, just moisten the stained spot using hydrogen peroxide before allowing it to stand for about an hour. Afterwards, blot the area and repeat the procedure until you are fully satisfied with the final results.