condensation

Lately I've noticed alot of condensation coming out of my exhaust,enough that I'm kind of concerned about rotting out my new mufflers.I put a cup under the tail pipe to collect some.It appears to be clear and not green.Awhile ago I put a 180deg. Tstat. in place af the 190 that I originaly had installed when I rebuilt it.Do you think if I put the 190 back in It would cut back on some of the condensation?Do you guys have any other ideas?Since it is winter time I haven't been driving her much but I do atleast let her warm up to opperating temps when i do start her.Thanks for any of your input.Mark