Hi Afke,

Generally when there is confusion of terms I (we localizers) refer to the MTC, as it is compiled by a pioneering body of linguists who review and research terms that eventually become the standard. They are often terms re-used and propagated throughout the majority of localized software products internationally given Microsoft's market reach. They also choose terms appropriate to specific software based on string length (for byte restrictions).

I think this resource will be helpful for you in deciding what is best (apart from the specific, individualized answers), and it will clear up much of everyone's confusion as regards context:

Select "Dutch" as the source. It should automatically set the target to English.

http://www.microsoft.com/Language/en-US/Search.aspx?sString=...

It comes up with 3 contexts, only 1 of which is appropriate here: "groom"

You can also do the reverse by entering "purge" or "clean up" or "maintenance" as the English and see the hundreds of different product contexts in which the Dutch terms "opschonen", "verwijderen", "leegmaken" etc. are used.