Wiper seals

where am I looking for debris at? and should i be looking for problem areas under the dash or under the hood or? I have not looked around real good with a flash light but i have looked through the vent in the cowl and not seen any debris and the car is a very solid car so i am doubting it being rust...so I am not sure exactly what to be looking for.....maybe some pictures guys?

sorry, not trying to trouble you guys. any and all help is appreciated,thanks
After rereading your post, if you have not replaced your wiper seals yet that could be the problem.
I have my dash out right and will take pics and post in a bit.