If you run out of laundry detergent, there are several household items that can be used as substitutes. Here are some options:

• White vinegar & baking soda: Mix half a cup of white vinegar and half a cup of baking soda and use it as a laundry detergent alternative.
• Lemon juice & baking soda: Mix lemon juice and baking soda and use it as a laundry detergent alternative.
• Dish soap: Use a small amount of dish soap as a laundry detergent alternative.
• Shampoo or body wash: Use a small amount of shampoo or body wash as a laundry detergent alternative.
• Borax: Add half a cup of borax to your laundry to enhance the cleaning power of your last bit of detergent.
• Powdered oxygen bleach: Use half a cup of powdered oxygen bleach as a last resort when you have no laundry detergent.
• Grated bar soap and borax: Grate a cup of bar soap and combine it with half a cup of borax and half a cup of washing soda. Mix the solution and use it as you would a normal laundry detergent.
• Baking soda: Use one cup of baking soda per large load of laundry as a laundry detergent alternative.

Note that these alternatives may not work as well as regular laundry detergent, and some may not be suitable for all types of fabrics. Its always a good idea to test a small, inconspicuous area of the fabric first before using any of these substitutes on a larger scale.