Banjo bolts leaking...

I put new brakes on the front of the goat this winter, and the calipers are leaking where the banjo bolts bolt to the lines/calipers.
I even tried new copper washers tonight. I got them tight, then tighter, still leaks, even under no foot preassure.

Bad lines?
Seal them with something else?
2 washers?

I'm not cruising because of a $0.04 cent part !!!!:(

I always put some sandpaper on a nice flat surface, then carefully sand the washers flat prior to installation. Might also want to ensure there is no gunk or debris on the sealing surfaces of the line and caliper.

Thanks will try again.