I never had a problem with a dark red bulb fogging paper. But ...
... is the fogging consistent across the paper, including the border? -- suspect your paper of heat/age damage.
... is the fogging in swirls?
-- suspect the light. The swirls come when swishing the developer in the try, so the liquid acts as a fluid lens and makes the patterns.
Do a print in total darkness (obviously except for the paper exposure) to diagnose further.
I've also had some "fast" papers that didn't like amber, so I had to go back to dark red.
Collin
