Windshield washers clogged

[H3.007]

Interesting - my wipers operate very poorly in certain winter conditions as well. And if I spray washer fluid onto the windshield, even de-icer fluid, it simply makes matters worse. Design flaw? Window? Wipers? It seems that there must be a signifiant amount of grime or snow on the windshield for the wipers to work properly - otherwise, the entire center portion of each side of the windshield is missed by the wiper.