How do you fix cordless blinds that won't go down?

To fix cordless blinds that won't go down, first, check for any obstructions in the blind's mechanism or the lifting system. Gently pull the bottom rail down while simultaneously pressing the lift cord or handle to see if it releases. If that doesn't work, inspect the internal mechanism for any damage or misalignment. If necessary, consult the manufacturer's instructions for troubleshooting or consider seeking professional assistance.