When should you remove plastic domes from flats of seedlings??

I started a bunch of seeds this month (mostly annuals, some perennials, no veggies except for a few ornamental kale), & most are sprouting nicely. They're covered with plastic domes. I read on 1 website to remove the domes once the seedlings are a couple inches high, but another website said to remove them once the seeds sprout, period. Which is right?/at what point should the domes be taken off??

Submitted by shan_kat7

Remove coverings on seed starting trays as soon as the seeds have sprouted. Excess humidity under the domes can promote fungal diseases such as damping off.

Answered by DSchrock