The windshield washer container on my 2000 GS300 doesnt seem to keep fluid in it. I cant find the leak. I filled it up the other day and drove it and when I returned, it was just about empty. I dont think this is covered under warranty anymore, but I am going to doublecheck.

Does anyone have any suggestions? I dont see any leaks when I look under the car. Is this part difficult to replace?

any help would be appreciated