Cloudy glasses after the dishwasher: film, spots or etching?

Separate a spotted load from one cloudy set

Compare an affected glass and a clear one in the same light. Are they the same product? Do plates and the dishwasher interior also have film? Spots across different materials direct you toward water runoff and the wash routine. Haze confined to one older set raises a separate question about that glassware.

Set chipped or cracked glassware aside. Decorated, coated, antique and specialty pieces need their maker’s care method. The vinegar check below is for plain glass that tolerates it.

Recall the last meaningful change: detergent, softener setting, home, cycle, or an empty rinse-aid reservoir. Start there if it matches the symptom. An old tumbler remaining cloudy is not itself a reason to replace the appliance.

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Test one suitable plain glass, not the whole cabinet

Whirlpool owner guide W10708713 describes a five-minute soak in white vinegar to check removable cloudiness. For a plain glass whose maker permits vinegar, place it in a compatible container away from stone countertops, cover the affected area with ordinary white vinegar, and set a five-minute timer. Do not substitute concentrated cleaning acid or mix in another product. Rinse thoroughly and inspect after drying.

For a smaller test, Whirlpool’s support page describes gently rubbing one area with a soft cloth and a little white vinegar. Leave an adjacent area untreated, rinse, dry and compare. Choose the spot check or the five-minute soak rather than extending the acid treatment when a mark remains.

A clear patch shows that some material was removable. If another band stays hazy, it may be a different deposit or damage. Whirlpool identifies both silica film and etching as possibilities when haze persists, so an unchanged vinegar test alone cannot settle the diagnosis.

Confirmed etching is permanent; abrasive pads, polishing compounds or more acid cannot restore the original surface. If film clears, correct the wash conditions before putting the glass back into routine dishwasher use.

Fix loading before adjusting the chemistry

Put dishwasher-safe glasses in their designated rack, stable and separated, with enough tilt to drain. Do not nest cups or press their rims together. Move tall utensils out of spray-arm paths and keep pans clear of the detergent dispenser door.

With the dishwasher off and cool, rotate accessible spray arms where the model permits it. Move any pan or utensil they hit. If spray holes contain debris, find the arm’s removal diagram before cleaning: it shows the fastener and how the arm locks back into place.

Scrape food from dishes and leave spray paths clear. Bosch advises against routine prerinsing. Choose the program for the load and glassware. Extra heat is not a general cure for haze, and delicate glasses may belong in the hand-wash pile.

Separate the rinse-aid supply from its dose setting

Refill an empty rinse-aid reservoir to its marked level, wipe up spills and close the cap. The reservoir holds the supply. A separate setting controls how much enters each cycle. Refill first, then judge whether the setting needs changing.

Bosch’s SGE78B55UC manual describes opposite adjustments for different symptoms: more rinse aid can help spots and drying, while less can reduce streaks. Find that adjustment on your own model rather than copying the Bosch button sequence.

If streaks appeared after you raised the setting, lower it as the model directs and check the next normal load. Increasing the setting again is unlikely to resolve a problem that began with the first increase.

Match detergent and softening to the actual water

Obtain current supply hardness from the water provider or a suitable test, and confirm whether the dishwasher’s actual supply is softened. Use the units printed beside the result. A ZIP-code average cannot show whether a household softener feeds this appliance.

Hardness of 171 ppm as calcium carbonate is about 10 grains per US gallon: 171 ÷ 17.1 = 10. Match units before choosing the range in your dishwasher’s table. Grains per gallon, ppm and German degrees (°dH) are different scales. A total-dissolved-solids result is not a hardness reading.

Match the detergent’s dose to the load and hardness within the dishwasher’s limits. Hard-water film and softened-water etching call for different adjustments. Keep hand dishwashing liquid out of the machine, and use packets whole rather than cutting one to estimate half a dose.

Only machines with a designated built-in softener take dishwasher salt. Bosch's salt guidance applies to those systems. Use the specified dishwasher salt and hardness setting where fitted; do not add table salt to the tub. If the tub has mineral film, choose a descaler permitted for the appliance and follow its empty-cycle, placement, and rinsing steps.

Judge progress on previously clear everyday glasses after the next normal load. No new deposits is improvement even if an old etched glass stays hazy. Poor filling, drainage errors, or continued poor cleaning after setup and loading corrections calls for service rather than repeated descaling.