Cut glass stays readable when the surface stays clear. Care is a short rule you can trust: wash by hand, dry at once, store upright. Heat, harsh detergent, and stacked rims are what dull a facet.
EDO 1834 writes care as house practice for Japanese cut glass. Where a product page has a specific line, that line takes priority. This article does not invent a material or a machine setting.
Wash, dry, store. That is the whole method. The next two posts go deeper on washing and on cloud.
A short care rule
Hand wash with mild soap and a soft sponge. Rinse fully. Dry with a soft, lint-free cloth before the glass sits. Store the glass upright, with space between pieces, away from a hot lamp or a stove edge.
That rule covers a whiskey glass, a tumbler, and a sake glass. The cut is a line in the wall. Light enters, breaks, and returns. Soap film, mineral spots, and stacked rims stop that return. Care is the work of keeping the line visible.
We do not call our glasses dishwasher-safe. A listing that does not say it should not be assumed. Heat, hard water, and detergent in a closed machine are the usual path to a cloudy bowl. Read Cloudy Cut Glass: Mineral Film vs Etching if the glass is already hazy.
Wash and dry
Hold the base or the lower bowl. Do not twist the rim against the tap. A rim is the thinnest ring and the easiest place to chip. Use a soft sponge only. An abrasive pad will scratch a facet and leave a dull track you cannot polish out at home.
Water should be warm, not sudden. A jump from a cold glass to hot water can shock the wall. We do not publish a safe temperature range we have not measured. Mild dish soap is enough. You do not need a glass-specific formula. You do need a full rinse. Soap left in a groove dries as film.
Dry at once. Water left in a cut dries as a spot, then as a mineral ring if your tap is hard. A lint-free cloth, or a clean microfiber made for glass, is better than a kitchen towel that leaves lint in the pattern. Work the grooves. Stand the glass on a cloth for a minute if the base holds a drop, then dry that drop too. Read How to Wash a Cut Glass Whiskey Glass for the step-by-step.
Store and heat
Store upright. Rims chip when glasses stack or rest face down. Leave a finger of air between pieces so they do not knock when a shelf door closes. A cabinet is fine. A crowded tray is not.
Keep the glass away from a hot lamp, a dishwasher vent, and the rim of an oven. Heat that is fine for a mug is not a care method for cut glass. Do not move a glass from freezer to warm water. Do not assume microwave, freezer, or oven use. If a listing does not say it, do not do it.
If a capacity is printed, that number is for filling. It is not a reason to force the glass into a tight cupboard. Shelf space is part of care.
What detergent and time can do
Harsh cleaners will haze a cut surface. Citrus descalers, oven cleaner, and powdered abrasives are the wrong tools. If you need to lift mineral film, use a mild white-vinegar rinse, then wash and dry as usual. Vinegar can help film. It will not repair etching.
Etching is permanent dullness from heat and detergent. It looks cloudy even when the glass is wet. Film looks cloudy when dry and often clears when wet. That is the test. Do not promise yourself a restore if the glass stays dull under water. Change the wash method instead, and protect the glasses that are still clear.
If a glass arrives with a chip, stop using it and write to the house with the order number and photographs. Care does not cover transit damage. That is a shipping question.
The Care page in the shop is the short version of this rule. This Journal post is the longer one. Washing and cloud have their own entries so you can open the page you need at the sink.
Related reading: How to Wash a Cut Glass Whiskey Glass · Cloudy Cut Glass: Mineral Film vs Etching · Care · Whiskey Glasses · Tumblers