I've had a foot fungus for six months now. I've tried 2 types of steriod creams and a prescription anti-fungal cream. What else can I do?

See answer. Steroids actually make fungal infections worse, so stop them if you haven't already. Your diabetes may also be a factor, especially if it is not well-controlled. You may also need to have a culture taken of the fungus. This would show which medications it would be most sensitive to. Best to follow-up with your doctor to discuss options.
Talk to your doctor. You may need an oral antifungal. You need to discuss this with your doctor.
Foot fungus. Tinea pedis should respond to topical antifungal creams. Toenail fungus or onychomycosis requires systemic oral pill therapy as sometimes does resistant athlete's foot.