They’re Hard to Raise: Blinds should be very easy to raise because of the pulley system it uses. If you’re continuously having issues raising the blinds it could be one of two issues. The first is that the lifting mechanism might be damaged somehow from overuse due to age or something else. The second issue is that the cord is too short to handle the width of the blinds.
Frayed Cords: Another good indication is the cords are starting to fray because of the age of the blinds or something in the mechanism is wearing down the cord. The more the cord is fraying the closer it to snapping completely.
Blinds Don’t Close: Blinds are supposed to act as privacy and a sun blocker. If the slats don’t close completely, it means the tilting mechanism is acting up or broken. If you’re able to get a replacement mechanism the entire blind will have to be recorded.