Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Hi, the instructions to descale it is to add cream of tartar. I'm wondering if vinegar can be used as a substitute and is it advisable? Thanks!
Document: I love this kettle. It's speedy and attractive. The inside heating plate will discolor in the same way that &#34;exposed&#34; heating elements will. Descale with equal parts water and vinegar.
Fantastic kettle. For the price I think it offers the best deal. Doesn't leave plastic taste once you've boiled vinegar water in it a couple times, and you can put it on the stand from any position. I've had others that boiled water faster, but I'm happy with the product overall.
I've had several brand electric water kettles and this is by far the best I've ever bought. Follow the instructions for cleaning it before you use it. Looks great and the red color matches my other red kitchen appliances ... amazing! Capacity is big, heating element hidden, boils water fast ... I'm love'n it every day!
I was really excited to buy this kettle because I read it didn't cause a plastic taste. Before using it, I followed the instructions to eliminate the taste by boiling and dumping the water. I did it more times than suggested just to make sure. I also used it 5-6 times hoping the taste would go away, but it didn't. You can't taste the plastic when the water is hot.
I first used an electric kettle on vacation in the UK. Why doesn't everybody in the US have one? I bought this as a gift for my tea-loving son and it is so fabulous, I'm buying one for myself. Maybe one for work, too.
My family and I love this kettle. We used to have a stove top kettle, but we hated how long it took for the water to heat up, and cleaning it was a pain. Switching to this kettle was definitely a step up.It is handsome looking on the kitchen counter, it heats up quickly, and it is of incredible quality for the price. I'm heading of to college in a few months and I'm taking it with me.
My new kettle arrived a few days ago, and it's a little darker red than the product photo looks on my screen, not quite as bright, which is just fine with me. It doesn't seem as dazzlinglyfast as the one we used in England, and I'm not sure it's much faster than a microwave for heating one mug of water. I was surprised it didn't whistle, but the boiling is loud enough for me to hear it from the dining room.
It works fast and great. It suggested boiling water in it 3 times before actually using it. I only boiled water in it one time then the 2nd time used it for hot coffee water and one of those instant noodle soups that you add hot water to. The coffee and soup tasted great with no funny water tastes. So in my opinion you only have to boil water in it once to removed any unusual tastes.
Excellent product. But, make sure to boil and discard detergent or vinegar water 3X to reduce exposure to plastics additives.
It is everything that it states on the information page. If anyone is wondering about purchasing one, buy this one.
Answer: I have extremely hard well water and I use  white vinegar, about a tablespoon full, fill to the max line with cold water, push the on switch, let it stop on its own.  Then I dump the vinegar water down the drain for double duty and sanitation.  Be sure to fill again to the max with just cold water then run the cycle again before you use the pot.  I love my pot.