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Fill your sink or a bucket with warm (not hot) water and a small amount of mild dishwashing soap. Too much soap can leave a cloudy film, so only use a little bit. Swirl or agitate the water to mix the solution thoroughly. Line the bottom of the sink or bucket with a rubber mat, soft cloth, or even paper towels to prevent damage to your crystal. Do not use hot water to clean crystal as this can cause it to break. You’ll want to do one piece at a time to prevent the items from clanking together, which could cause chipping or breakage. If needed, allow your crystal to soak for a few minutes. If your item is too big to fit in the sink or bucket, or cannot be fully submerged, such as a lamp or chandelier, dampen a soft cloth or sponge in the solution and use it to carefully wipe down the item. Use warm (not hot or cold), running water to rinse away any residue from the crystal. Don’t rinse with cold water as the sudden temperature change can cause the crystal to crack. You may want to wear gloves to ensure you aren’t putting fingerprints on your clean crystal.  For those larger items, use a clean, wet cloth or sponge to wipe down the item and remove any lingering soap. You could also rinse your crystal in a bucket or bowl of distilled water, as this will reduce the amount of water-spots left behind. Rub the toothpaste around with a cloth, sponge, or even just your finger. Keep rubbing the toothpaste around on the crystal until you have removed the mineral deposits. Then, rinse the toothpaste off of the crystal. Be careful not to press too hard! If your crystal is cloudy from stuck on mineral deposits or other types of residue, then you might also need to cover it in a paste made from vinegar and salt. Pour about 1 tsp (3g) of salt into a small bowl and add just enough vinegar to form a paste. Spread the paste over the crystal, and leave it on the crystal for 10 minutes. Then, rinse the paste off when the time is up. For even more stubborn residue, put about 1/2 of a cup (120 g) of baking soda into the crystal and then pour 1 cup (240 mL) of vinegar over it. The foaming action will help to clean the crystal and remove the residue. Rinse the crystal with water after the baking soda and vinegar stop foaming. Gently wipe each item down with a lint-free cloth. This will remove any water spots and give your crystal a beautiful shine. Again, it is a good idea to wear gloves to prevent smudging your clean crystal.
Create a solution with warm water and mild dish soap. Submerge your crystal in the solution. Rinse thoroughly. Apply a bit of toothpaste to remove mineral deposits on the crystal. Cover crystal in a mixture of vinegar and salt to remove deposits. Dry your crystal.