Homemade dishwasher detergent is a simple mix of washing soda, borax, citric acid, and salt that you use 1–2 tablespoons per load.
Making your own dishwasher detergent cuts packaging waste and puts you in control of the ingredients. The basic method is mixing dry ingredients thoroughly, breaking up clumps, and dispensing 1–2 tablespoons per wash in the detergent compartment. It’s not complicated, but a few details decide whether your glasses come out clear or film-covered.
The Basic DIY Dishwasher Powder Recipe
The most widely shared formula balances cleaning power with hard-water control. Combine these dry ingredients in a bowl and stir until uniform:
- 1 cup borax
- 1 cup washing soda
- 1/2 cup citric acid powder
- 1/2 cup kosher salt
- Optional: 20–30 drops of lemon or citrus essential oil for scent
Break up any clumps with a fork or whisk as you mix. Transfer the powder to a glass jar with an airtight lid and store it in a dry place — moisture is the main enemy, since damp powder hardens into clumps that won’t dissolve properly during a wash cycle.
Use 1 tablespoon for lightly soiled loads and 2 tablespoons for heavy or hard-water loads. If you don’t have borax on hand, a slightly different approach swaps it out: combine 1 cup washing soda, 1 cup borax, 1/2 cup kosher salt, and 3/4 cup unsweetened lemonade mix (the citric acid does the descaling work), with up to 10 drops of essential oil.
How to Make Dishwasher Detergent Tabs
Powder works fine, but tablets are convenient if you prefer pre-measured doses. The same dry base — washing soda, borax, salt, and citric acid — gets a small splash of water or vinegar to create a moldable “damp sand” texture. Press the mixture into silicone molds or an ice cube tray, then let the tabs dry for 24 hours to 2 days before popping them out.
Store finished tablets in an airtight container just like the powder, and use one tab per load. This method takes a little patience but gives you the same convenience as store-bought pods without the plastic wrapping.
Borax-Free Recipes and Common Mistakes
Some households prefer to skip borax entirely. Borax-free versions typically substitute oxygen bleach, enzymes, or extra washing soda to maintain cleaning power. If you’re avoiding borax for personal reasons, look for recipes built around washing soda plus oxygen bleach and salt — but know that these mixes may struggle on heavily soiled loads compared to commercial detergents.
The biggest mistake people make is adding liquid dish soap to the mix. One source explicitly warns against this — liquid dish soap creates excess suds that can damage the dishwasher over time. Another common error is skipping the airtight storage, which lets moisture turn your powder into a brick. And don’t just guess at the dose: hard water and cooler wash temperatures call for the higher end of the 1–2 tablespoon range.
One more warning: several DIY recipes aren’t standardized, and they may not perform as well as commercial automatic dishwasher detergents on greasy or baked-on food. For consistently tough loads, you might prefer a tested eco-friendly option — our roundup of the best eco friendly dishwasher detergent compares commercial formulas that handle heavy soil without harsh chemicals.
| Ingredient | Role in the Mix | Good Substitute |
|---|---|---|
| Washing soda | Main cleaning alkali that cuts grease | Baking soda (weaker but works) |
| Borax | Softens water and boosts cleaning | Oxygen bleach or extra washing soda |
| Citric acid | Fights hard-water film and residue | Lemonade mix powder |
| Kosher salt | Helps soften hard water | Table salt |
| Essential oil | Optional scent, use sparingly | Omit entirely |
FAQs
Can I use baking soda instead of washing soda?
Baking soda works in a pinch but is noticeably weaker than washing soda at cutting grease and food residue. If you only have baking soda on hand, you can convert it by spreading it on a baking sheet and heating it at 400°F for about an hour — the heat drives off the moisture and converts baking soda into washing soda.
Does homemade dishwasher detergent work as well as store-bought?
For lightly and moderately soiled loads, yes — a well-mixed homemade powder with washing soda, borax, and citric acid handles everyday dishes fine. Heavily baked-on food and greasy pans are where DIY mixes fall short, since commercial detergents include enzymes and surfactants that break down tough proteins and fats that home recipes lack.
Why is my homemade detergent clumping in the jar?
Moisture is almost always the culprit. If the jar wasn’t completely dry when you filled it, or if you stored it near the dishwasher where steam escapes, the powder absorbs humidity and hardens. Break up clumps before use, but the real fix is a truly airtight container in a cool, dry spot away from the sink.
Is vinegar safe to use with homemade dishwasher detergent?
Vinegar is fine in the rinse compartment to cut spotting, and a splash of it can help bind powder into tablets. Just never mix liquid dish soap or regular liquid detergent into the powder itself, since those create excessive suds that can overflow and damage the machine.
References & Sources
- Bob Vila. “How to Make Homemade Dishwasher Detergent.” Covers the basic powder recipe and the oven method for converting baking soda to washing soda.
- The Spruce. “Dishwasher Detergent Recipes.” Provides ingredient ratios and usage notes for DIY powders and tablets.
- Kitchn. “How to Make Your Own Dishwasher Detergent.” Details the mixing method, storage guidance, and warns against using liquid dish soap.