Hi James,
I agree likewise - actually posting your settings would be helpful - and when you are talking 'clutter' do you mean visual or audio? Also what are you displaying the 'traffic' on? (by which I mean tablet, phone or other - such as Dynon display) and if a phone or tablet, which software are you using? (presumably something like SkyDemon or EasyVFR - or are you using something else?)
As a general principle when setting up PAW, we usually recommend leaving the settings in PAW 'wide open' (i.e. at maximum vertical and horizontal range) and using the display system filters to control what is or isn't displayed. In SkyDemon, for example, this is set in 'Settings/Navigation Options/Show Within Vertically'. This setting allows you to choose the relative (vertical) altitude range you want to be warned about. Most will set it to somewhere around +/- 1000 or +/- 2000 feet. That should exclude most of the stuff you don't want to see (and aren't likely to collide with unless one of you is climbing or descending steeply), while ensuring you get sufficient warning of anyone climbing or descending rapidly towards you. Remember of course that within your chosen relative altitude band all traffic is automatically displayed within the range limits of your display screen. If this is showing too far out for you, you need to adjust the display range scale setting. I normally fly with SkyDemon on the 500K (1:500,000) scale, which seems about right. If you set yours to a smaller scale - e.g. 250K (1:250,000) - your display will of course only cover a smaller area, with correspondingly less aircraft, but at the same time less advanced warning of any potential conflict.
The exception to the above is the display of 'Bearingless' target aircraft (which are becoming less and less as people fit modern EC devices and the coverage areas of ATOM and iGRID expand). With 'Bearingless' targets, you have to choose an appropriate 'Range' in the Bearingless targets section of PilotAware / Configure. I normally advise using the 'Medium Range' setting, unless you are happy to only get warnings (without a directional bearing) at relatively close range, when the 'Short Range' setting should be selected.
Hope this helps.
Peter