My 1997 Protege is running a lot warmer than it has ever before. It is not overheating but the temperature gauge is definitely up there. I had a rad flush - seemed to help for a bit - but then the temperature went up again..
Any suggestions??

Check your themostat may be sticking partially shut.

I had similar issue last year on my B2200; I changed both radiator cap and thermostat, cured the problem.