DIY Laundry Detergent: Does It Actually Work?

The Appeal of DIY Laundry Detergent

DIY laundry detergent recipes — typically combining washing soda, borax, and grated bar soap — have been popular for years as a cost-saving, chemical-reducing alternative to commercial detergent. But do they actually clean clothes effectively? The honest answer is: it depends on what you're washing and how.

Common DIY Laundry Detergent Recipe

The most common recipe combines:

• 1 cup washing soda (sodium carbonate)
• 1 cup borax
• 1 bar grated castile or Fels-Naptha soap

Mix together and use 2–3 tablespoons per load.

What DIY Detergent Does Well

• Lightly soiled loads: Works reasonably well for everyday clothes that aren't heavily soiled.
• Cost: Significantly cheaper per load than commercial detergent.
• Fewer synthetic chemicals: Suitable for people who want to reduce chemical exposure.
• Sensitive skin: Fragrance-free versions can work well for sensitive skin.

Where DIY Detergent Falls Short

• Enzymes: Commercial detergents contain enzymes (proteases, amylases, lipases) that break down specific stain types — protein stains, starch stains, oil stains. DIY recipes don't contain enzymes, making them less effective on tough stains.
• HE machines: Soap-based DIY detergents can leave residue in HE machines and may void warranties.
• Hard water: Soap reacts with hard water minerals to form soap scum that deposits on fabric, making clothes feel stiff and look grey over time.
• Heavily soiled loads: Not effective enough for work clothes, sports kit, or heavily stained items.

A Better Approach: Boost Commercial Detergent

Rather than replacing commercial detergent entirely, consider using a smaller amount of a good commercial detergent and boosting it with natural additives:

• Half a cup of baking soda in the wash
• Half a cup of white vinegar in the rinse
• Arm & Hammer plus OxiClean — a commercial detergent with built-in natural boosters

This approach gives you the enzyme-based cleaning power of commercial detergent with the benefits of natural additives.

The Verdict

DIY laundry detergent works for lightly soiled loads in soft water with standard machines. It's not suitable for HE machines, hard water, heavily soiled loads, or as a replacement for enzyme-based stain removal. For most households, a good commercial detergent used in smaller quantities is more effective and not significantly more expensive.

Final Thoughts

DIY detergent is worth trying if you have soft water, a standard machine, and mostly lightly soiled loads. For everything else, a quality commercial detergent boosted with baking soda and vinegar gives better results at a reasonable cost.