Which is better for sensitive skin?

Both are good choices. Molly's Suds is free of SLS/SLES, optical brighteners and synthetic dyes and fragrances, and Dirty Labs is hypoallergenic and free of dyes, sulfates and parabens. If you react to scent, check each label carefully, since both are scented.

Molly's Suds. One 4 L bottle covers up to 133 loads, while Dirty Labs gives 32 loads per bottle and 80 per refill pouch. Dirty Labs needs refills about four times as often.

Is Dirty Labs worth the extra cost per load?

It depends on what you value. You pay more per load for the biobased enzyme formula, cold-water optimization, aluminum packaging and refill system. If cost per wash matters most, Molly's Suds wins.

Which works better in cold water?

Dirty Labs is optimized for cold water, so it is the safer pick if you wash cold most of the time. Molly's Suds also rinses clean in all temperatures, including cold.

Are both safe for septic systems?

Yes. Both are labeled septic safe. Molly's Suds also notes it works well in hard water to break down mineral buildup.

Which is better for HE washers?

Both work in high-efficiency washers. Dirty Labs also works in traditional washers, and Molly's Suds works in standard, commercial and HE machines.

Liquid Laundry Detergent vs Signature Bio Laundry Detergent

Buy Dirty Labs Signature Bio if you want a hyper-concentrated, cold-water enzyme detergent in a small recyclable aluminum bottle with a refill pouch; buy Molly's Suds Liquid if you want a big 4 L bottle that covers up to 133 loads at a low cost per load. Dirty Labs has the stronger rating base (4.8 from 3,731 ratings vs 4.6 from 751) and the more modern packaging, but Molly's Suds gives you far more washes per purchase. No prices were provided for either product, so compare live store prices before deciding.

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