On 09-Oct-17 8:11 AM, Dan Espen wrote:
....

No idea, but then you haven't given sufficient hints.
....

I suggest you open the windows and doors and turn on any fans you have.

I suspect since the original post was in May, 1998, OP's either gotten
used to it or replaced them or moved by now...

In reality, as the posters back then responded, in all likelihood there
was a previous owner with pets and the steam cleaning dissolved
existing pet urine in the carpet and pad and left the residual odors
therefrom for the (then) current resident...

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