Clean Freaks Co. Track, sill, and frame deep cleaning in Los Altos Hills.

Most large homes on these hillsides run a mix of frame types across a single elevation — anodized aluminum on the older openings, powder-coated frames on the newer ones, and clad-wood casements where the architecture called for warmth. Each takes cleaning differently: anodizing scratches and dulls under abrasive pads, powder-coat can be chalked or stripped by the wrong solvent, and clad-wood needs the water kept out of the joint where the cladding meets the timber. The tracks below them are not shelves to wipe — they are horizontal drainage channels with weep holes and roller carriages engineered to move water back outside, and they only work when they are clear.

What fills them here is specific to the mid-Peninsula. Marine fog spilling over the ridge settles as fine damp that lingers in shaded, north-facing tracks long after the day warms, so debris never fully dries out. The oaks add their own calendar — catkins and pollen in spring, leaf litter and tannin staining in fall — and it all migrates into the sills. Graded driveways and the unpaved margins of these lots shed grit that runoff carries downslope and deposits in the lower channels after every rain. Combined, that becomes a damp organic paste that pits aluminum, mildews in the corners, and packs the roller wheels until a heavy slider drags.

The real failure point is drainage. When the weep holes clog, water no longer exits the track; it stands, backs up under the frame, and during a wet winter works its way toward the interior sill and the wall below. Clearing the visible grime without freeing those channels leaves the actual problem in place — which is why frame and track cleaning here is treated as its own category, not a pass of the glass crew’s rag.

1. Identify the finish on each opening — anodized aluminum, powder-coat, or clad-wood — and match chemistry and pressure to it, so the frame is cleaned without dulling the anodizing, chalking the coating, or driving water into a clad-wood joint.
2. Dry-lift the oak catkins, leaf litter, and hillside grit out of the tracks first, before any water is introduced, so abrasive grit is never ground along the anodized channel or under the rollers where it scores the raceway.
3. Clear and flush the weep holes and drainage channels end to end, then free and lubricate the sliding-door roller carriages so the doors run true and water exits the track the way it was designed to.
4. Rinse the frames, wipe the corners and mitered joints dry, and leave the tracks dry rather than damp — so returning ridge fog does not immediately restart the mildew-and-corrosion cycle in the shaded, slow-drying runs.

• Late spring, once the oak catkins and pollen have finished dropping — that is when the sills carry their heaviest organic load of the year.
• Before the wet winter sets in, in autumn — weep holes cleared and draining ahead of the first sustained rains keep water out from under the frames.
• After the dry, dusty summer, when grading and hillside dust have blown fine grit into the tracks and roller channels.
• When a sliding door starts to drag or the rollers grind — a sign grit and paste have packed the carriage rather than a mechanical fault.
• After a run of heavy fog, when the shaded, north-facing tracks stay damp and begin to show mildew in the corners.