Welcome to the Forums!
I started with a garden sprayer with bleach/water when I first got Christine. She had so much growth on her I couldn't tell how bad the paint was, let alone see through a window.
When I wash her now, I use soap and bleach the top every 3 to 4 months. It's really humid here, hard to keep the growth off that white top.
Good luck and would love to see some pics. Keep us posted on your progress!
I had a similar problem with the title here. It took some time, but I finally got it done.
Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover.