HELP!

HELP!

Ahhh... this morning my zucchini and squash seedling leaves had white spots. My uncle suggested spraying them with baking soda and water to kill off any mildew that was growing on them. I did that and now they're shriveled and looking very weak. What can I do? Should I spray them with water to try to rinse off the baking soda? EDIT: Thanks for the help! I'm totally panicked, but I'll just have to wait and see.
Seed starting the thrifty way

Seed starting the thrifty way

Caladiums and grasses

Caladiums and grasses

One of my favorite times of the year

One of my favorite times of the year

Thai Basil question and garden pics

Thai Basil question and garden pics

Garden pics

Garden pics

photos of my garden…still a work in progress.

photos of my garden…still a work in progress.