Brake bleeder leak

[thinkingvolvo]

I bleed my brakes after replacing pads and rotors on all wheels. Use a motive power bleeder. Everything went well except the right front caliper... where after I bled it and tightened the bleeding valve, i can see some fluid ozing out around the threads. If I put the dust cap on and press it a little, it seems to get a drop of fluid around the threads. I am wondering if this is a leak or if this is residual fluid in the valve hole thats playing tricks... have left it overnight to see what happens or will replace the bleeder valve tomorrow.