Some of the hardest and worst stains to remove from carpets include dark-colored spills like red wine, coffee, blood, and ink. These stains can permanently discolor the carpet, especially on light-colored carpets, if they aren’t dealt with immediately. Bleach is also particularly damaging, as it causes near-instant color loss that cannot be restored by cleaning; the affected spot will likely need to be dyed or replaced. If DIY methods don't work on these tough stains, a professional carpet cleaner can help restore your carpet.

Vinegar and baking soda can be effective for removing old carpet stains, although success may depend on the type of stain. There are two common methods for this process.

One method involves combining the ingredients directly on the stain to create a chemical reaction. First, pour a generous layer of dry baking soda over the stain. In a spray bottle, mix distilled white vinegar with 1 cup of warm water and a few drops of liquid dish soap, then spray this solution thoroughly over the baking soda. The mixture will foam as the acidic vinegar reacts with the basic baking soda, which helps loosen and lift the stain. Let this sit for a few hours until it dries, then wipe or vacuum up the residue and blot the area with a clean, dry towel. You can repeat the process if the stain persists.

An alternative method suggests using the ingredients separately. Start by sprinkling baking soda on the stain and letting it sit for 15 to 30 minutes before vacuuming it up. Next, blot the remaining stain with a solution of equal parts white vinegar and water, and then blot the area dry with a clean cloth.

Because you likely don’t have the equipment to dry your oriental rug adequately, cleaning it with a hose or any deluge of water is a bad idea. The fibers of an oriental rug are especially dense, so water can cause damage like marking, fading, mold, and odor. Since sunlight can also fade an oriental rug, that’s not a good option for drying it to prevent damage.

How often you should clean your dining room carpet depends on how much foot traffic and spillage your home experiences. At the very least, you should vacuum once or twice a week to remove surface debris before it can become embedded in the carpet fibers. Hire a pro for deep cleaning every 12 to 18 months to maintain freshness while prolonging the carpet's life span.