Water leaking from dash on passenger side on floor board

Cleaning the A/C condensation line is a good start. You should be able to spot it coming out of the firewall and pointing down. You can use a stiff wire to clear it. If that doesn't fix your problem, it's possible you could have a heater coil leak, however, the liquid would have an antifreeze smell and the temp lever/knob would have probably needed to be in the heat temp range to allow the water to leak. (not an absolute, but potential contributing factor if it is the heater coil related). Since it is summer, most likely your condensation line. Good luck. There are also a number of helpful videos on YouTube. Just search for clearing 2004 Camry condensation lines. They may provide additional tips if you haven't been able to resolve the problem.