"Ik gebruik geen zeep."

Translation: I do not use soap.

[rick329813]

If I were Duo preening like other owls I would not want a mouthful of soap either

[deactivated user]

Is IT correct to say: ik gebruik zeep niet?

[MentalPinball]

No, I don't think so. As far as I know, before a non-specific direct object we need to use geen.

Non-specific: when there's no article, or the indefinite article is used (een), or a cardinal number or an indefinite pronoun (enige, enkele, wat, veel).

You'll find more information here:
https://www.duolingo.com/comment/3734833

and here: http://www.dutchgrammar.com/en/?n=WordOrder.47

[deactivated user]

Dank je.

[MentalPinball]

Graag gedaan! :)