“Inside the window” can mean two different things
Moisture on the side facing your room is different from moisture trapped between the panes. From a safe, reachable position, gently wipe a small area of the room-facing glass with a soft, clean cloth. If the moisture wipes away, that patch was on the exposed surface. If it stays, it could be outside or between panes; that test alone does not diagnose a failed seal.
Morning fog on the outdoor surface can be dew. Pella explains that humid air meeting cool glass can cause exterior condensation, which evaporates as the glass warms. That is a useful distinction for an air-conditioned Florida home: a hazy morning view is not, by itself, proof of damaged glass.
Do not climb, lean out, or dismantle the window to locate the haze. A photo and a note about when it appears are enough to start a service conversation.
The seal protects the space between panes
Insulated glass has separate panes with a sealed space between them. Andersen’s condensation guidance identifies moisture in that space as a sign of seal failure. A surface wash cannot restore the seal or clean the enclosed faces of the glass.
This advice applies to sealed insulated glass. Have a window-service professional identify the construction if you are not sure which type you own.
Contact the window supplier before booking another cleaning
For suspected between-pane condensation, contact the manufacturer, original installer, or a window-service professional. Gather the product label if safely visible, any purchase paperwork, and a photo of the affected window. Ask:
- Is the moisture inside the sealed glass unit?
- What component needs attention, and what replacement options fit this model?
- Does the existing warranty cover this issue?
For dirt on accessible glass surfaces, Valley offers interior and exterior window cleaning. If you see fixed spots rather than moisture, our guide to marks remaining after cleaning explains other possibilities. Cleaning and window repair are separate tasks.