One reason for this is the inclusion of Sodium Lauryl Sulfate (SLS) in many conventional cleaning products. SLS is generally used as a foaming agent, it’s foaming properties triggered when coming into contact with water. Without water, using these cleaning gels and creams would be one sticky mess—the more water that’s used, the more foam that's produced. These agents also need to be washed off any surface or item after use considering the harmful impact they have on human health. Compare this to using vinegar, which requires no water to offset it’s disinfecting properties and doesn’t need to be washed off a surface or item after it’s been used to clean (check out this site for oodles of recommendations for cleaning with vinegar) .