When rain hits a window, some assemblies manage incidental water
through channels and small openings called weeps. A track packed with
dirt or paint can interrupt that path. I suggest learning where your
windows are meant to drain before applying caulk to every visible
opening.
Open an accessible window and vacuum loose grit from the track. Use a
soft brush or a method permitted by the window manufacturer to clear
visible weep openings. Don’t drive a sharp tool into a hidden channel or
spray a strong jet of water into the frame. Check that the sash closes
fully and the weatherstripping sits properly. Take a photo of any stain
below the window and note whether it follows wind-driven rain or
condensation.
Recurring water indoors after the tracks are clean can indicate a
failed seal, flashing, installation, or wall issue. Have a qualified
window or exterior contractor evaluate it. Glass-unit fogging between
panes is another condition; cleaning the track will not repair a failed
insulated-glass seal. Leave designed drainage gaps open, even if they
look like a caulking opportunity.
For local window contacts, see Helpful
Resources. Basic brushes and household maintenance items appear on
Homeowner
Tools & Supplies. A soft brush is useful; a tube of sealant in
the wrong place is not.