In hard-water towns, cloudy dishes get blamed on minerals — and often correctly. Charleston flips that script. Our Edisto-fed water is so soft that scale is practically a non-issue, which means film, grit and rewashed-anyway dishes point at the machine itself. Here's the order we check things in on Lowcountry dishwasher calls.
First stop: the filter nobody has ever removed
Nearly every dishwasher built since the mid-2000s has a removable cylinder filter in the floor of the tub, and a startling share of the ones we visit have never been taken out. A loaded filter re-circulates gray water over the "clean" dishes — that's your grit, right there. Twist it out, rinse it under the tap, and repeat monthly. If the filter was clean, keep reading.
Spray arms: the holes tell the story
Pull the lower arm and hold it to the light. Seed husks, glass slivers, label paper and toothpick fragments lodge in the jet holes, and every blocked hole is a dead zone in the wash pattern. Upper arms clog less but wobble more — check that the arm spins freely by hand. A blocked or lazy arm shows up as one rack cleaning worse than the other, which is a diagnostic gift if you pay attention to where the dirty dishes ride.
Detergent: soft water changes the dose
Charleston's soft water needs noticeably less detergent than the package assumes. Overdosing leaves a slick film that feels like the machine failed, and pre-measured pods can genuinely be too much for lightly soiled loads in water this soft. If film is your complaint and the filter and arms check out, run a cycle with half your usual detergent and a rinse-aid top-up — the difference is often immediate. That white etching on glassware, by the way, is a soft-water phenomenon of its own and permanent once it happens; we wrote about it separately.
When it's genuinely the machine
A wash pump losing pressure cleans exactly like a clogged filter, and a failing inlet valve starves the cycle so there's simply less water doing the work. The tell: you've cleaned the filter, cleared the arms, corrected the dose — and plates still come out gritty. At that point the fix lives inside the machine, and it's a routine one: wash pumps, valves and chopper assemblies are standard van stock for the brands Charleston runs.
The five-minute monthly habit
Rinse the filter, spin both arms by hand, wipe the door gasket's lower lip, and run the machine hot and empty with a cup of white vinegar every couple of months. In this climate that routine prevents most of the calls this article describes — and when it doesn't, a fixed-quote diagnosis sorts the rest in one visit.