To really find the "X-Y coordinates" spread graph paper under there.
Disconnect the washer and/or turn off breaker. Remove access panel, take a look, you might see leak.
Turn off water supply. Dry it all out under there with fan and hair dryer. Then spread your paper. If floor is wet you'll never see the drips. Turn on water supply. Check for leak.
Run it thru a cycle and watch. Stop cycle when unit is full but before it starts wash. Check
Run thru wash, stop before drain cycle. Check
Let it drain. Check.
If water is running across frame or something before dripping DO NOT go reaching up under there trying to find where its coming from without turning breaker off first. If leak seems to be high and running down, use paper towel strips wrapped around and tucked in places, and start high and work down till it gets wet.
Door seals dry out, get bent out of shape. Gunk can build up at the bottom between door and seal where you can't see it without sticking your head in there.
If your power and water lines are long enough. pull it out from under cabinet and run a cycle where you can get a good look.
Check that every hose and water connection is tight, including drain hose connection under sink. Check for pinholes, cracks in hoses.
[CENTER][FONT=Comic Sans MS]Measure twice, cut once.[/FONT][/CENTER]
[CENTER][FONT=Comic Sans MS]Look at the nail, not the hammer. Watch the fence, not the blade.[/FONT][/CENTER]
[CENTER][FONT=Comic Sans MS]If you hook your thumb over your belt you won't hit it with the hammer or leave it layin on the saw table.[/FONT][/CENTER]