Talk through it. What are the basic functions of a windshield wiper. To wipe away rain water. What is it bad with. Removing dirt . Add micro scrubbers to help with dirt removed (for example Salt ). While wiper fluid can take care of this, spraying on a high way can be dangerous if your view is blocked for 3 seconds (based on wiper speed). Self activated wiper blades when coming in contact with water, or the sensors have detected that the windshield is obstructed. Different design to cover the whole windshield better instead of just an arc. Rails on the top and bottom of the windshield with a complete sweep, ultra thin scrubbing pad with spray that is self activated and speed is slower rather than faster. Micro scrubbers can also cut through frozen ice on a windshield, or even a couple inches of snow. The idea is to keep talking. As you land on ideas you like, make a note of them , and finally summarize your best answers. Be prepared for a rebuttal on some of your ideas, and count on them being shot down.