The people that make and sell clear plastic for boats love it when you use Pledge on the stuff. Over time, Pledge will turn your clear yellow. Keep the pledge for your furniture and use the PLEXUS. Spray it on and distribute and wipe the entire area well. Just before it dries completeley, use a different clean cloth to finsh the job. I promise you won't be disapointed. I have a 1997 Grady with the original clear and Plexus is the only stuff I have ever used except de-natured alcohol or soap and water. NEVER used a brush of ANY KIND or your clear and only use VERY SOFT CLOTH to clean or polish the stuff. If you do one coat of plexus and let it dry for a few hours and then do a second coat, the stuff stands up well to Boat soap, salt and even bugs when you trailer. Always rinse as much salt or other debri from the clear BEFORE you wash.
This has been my procedure -- I'm sure someone has other or better ideas. This has worked great for me for the past 11 years I have owned this boat. BTW -- The boat stays coverd in the off season to minmize the U/V exposure.