Incessant clicking background noise

I recently bough a Fuze for 1 main purpose; to record seminars & conference calls for my business. The first few recordings I made had a very irritating clicking non-stop in the background. I called support, & they had me download & install new formware. I was told if that didn’t solve the problem, to return it to BB for a replacement, which I had to. Now the replacement has the same problem. I even exchanged the 1st one for another at a different store in a different town. Is there anyway to eliminate this problem, or am I going to have to buy a different piece of equipment? I should add that I have made a number of recordings in different venues to make sure there wasn’t something in one place that was causing this.

Thanks for any help of advice.