Possible blocked A/C drain

[MG88]

Hey all not sure if this is the right section.

The other day I noticed the passenger floor was wet. I suspect the drain may be blocked. I had the nav on the hoist today but I couldn't get to the drain from underneath. Is there a better way to access it and has anyone else had the issue and what they did to resolve it.

Thanks in advance.
Matt

 

[Aussie Frontier]

I thought mine was blocked so I tried a few checks
I slipped a cable lie up the tube from underneath
Put the fan on full and closed all the vents to see if any air came out
Put compressed air back up the tube.
All seemed to check out