aluminum imac - condensation problem

I've seen this reported in various other fora, I have the same issue though not as severely as some. In my case, the condensation on the inside of the front glass panel is just a light mist (like when you breathe on a window pane) rather than visible droplets (thank God). My question is - does a permanent fix exist, or is this just a fact of life that we have to accept? I don't see much point exchanging the unit - glass+temp differential = condensation! Just wonder if anyone has figured something out.

Cheers from Jamaica!