Hans Blix as quoted by the BBC:

... the Americans "lost patience some time at the end of January or the beginning of February," Mr Blix said.
He suggested that Washington was "doubtful from the beginning" about the process.

Let's never forget that the Washington Post was doing its best to discredit the inspections process, by casting the inspectors as perverted and incompetent, all the way back in November:

No Apologies: The Story of Jack McGeorge