Losing Fuel

Its the crap gas we have these days. Edelbrocks are terrible for this. I recently pulled my carb and turned it upside down to drain. I got about an ounce of what looked like ice tea. I had just ran the car about a week prior.
Even the non-ethanol gas has other crap blended with it such as naptha. Anyone else notice the black mold like stuff that grows around the fuel cap or anywhere this stuff vents?
On a side note there is one other common problem with edelbrocks that will cause really hard starting. Underneath the accelerator pump nozzle is a check ball. These like to stick. Pump your throttle and see if your getting anything after it sits overnight.