Water in floorboard,drivers side.Have checked during rain,but no visual leak

Is it water or antifreeze?
the latter is slippery juice, water not. (sniff sniff, sweat smell, is AF) if yes heater core or just hose leaks.
if it is water, then and only you drive this car.?
then it leaked water with doors closed.
if others drove car, maybe they had doors open in rain.
I cant guess that.
but if it really is a water leak, then its 1 of 2 things
windshield cracked, or caulk failures.
or door gasket failure.

the door gasket can be checked 4 ways. (more really)
1: look at it ,if damaged it is. or gasket damage.
2: look for collision damage, door bent.?
3: use news paper strips. say 4'' wide and put in seal area
and close door, can you pull; out paper?
yes, fail
no , pass. repeat all around the door.
4:or the water test. with garden hose and 2 people.


or drive to any body shop and ask them,
this is super easy for them.... let them.....?

I'd try pouring water harshly towards the windshield, (outside, of course). Next, do the same with driver's side door. If this fails, try again with a water hose. Remember, when it's raining, there's much pressure, especially if you're driving. I would really try to get water to leak into vehicle, it would be much easier with a friend's assistance. I hope this helps!