Symptoms
- View through the peephole is cloudy or distorted
- Glass lens is cracked or missing
- Moisture visible between the lens layers
Likely causes
- CommonMoisture trapped between peephole lens layersTemperature differences between inside and outside the door can cause condensation to form inside a sealed peephole.
- PossibleAge-related clouding of the lens materialPlastic lenses especially can cloud or yellow over many years.
- PossiblePhysical damage from an impactA bump or forced entry attempt can crack the lens or housing.
- PossibleOriginal peephole was low qualityCheaper peepholes are more prone to fogging and clouding.
What to do
- Unscrew the two halves of the existing peephole from either side of the door; they typically thread together and separate easily.
- Measure the diameter of the existing hole in the door to ensure a replacement peephole will fit, since sizes can vary slightly.
- Clean out the hole of any old sealant or debris.
- Thread in the new peephole from the outside, then screw the interior half onto it from inside until snug.
- Test the view to confirm it's clear and properly focused.
- Consider a wide-angle or digital peephole if you want an upgrade over the original.
Tools and parts
- None typically required beyond the parts
Door peephole viewerSearch: “door peephole replacement standard size”
When to call a pro
This is a simple enough repair that a locksmith or handyman visit usually isn't necessary unless the door itself needs a new hole drilled.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.