All electronic equipment generates some noise. But, as you can tell by looking through this forum, the Factor pedals are not bad.

Things to check:

1) Make sure the level switches on the pedal are in the right positions.

2) Make sure your guitar is turned up full.

3) Try different cables.

4) Look at your EQ/tone controls and be sure that there is not too much high end boost.

The fact that you've had the same problem with other pedals suggests (but only suggests) that the problem may be at your end.