Choosing a new dishwasher
When you choose a new dishwasher, you need to consider how many people are in your household and how often you will need to wash your plates, cutlery, pots and pans. If you regularly cook for a large number of people you will do more washing than if you get constantly dine out or get take-away. If you have frozen dinners you may use your own plates but there will be less washing than if you cooked a whole meal.
Size is definitely the number one factor. If you don’t cook much, you wont need to wash as much, so if you have a large dishwasher it will be much less efficient if you are regularly washing small loads.
Also consider the different wash cycles these can include fast wash, economy wash, soak and heavy wash. Some are designed specifically for china, or glassware, or pots and pans, or plastics. Do you want a hot or cold water connection. Cold water connectors will heat the water when needed which makes them more efficient. If you need a hot water connection check the recommended maximum temperature as they made need a tempering valve. If you live in an area with hard water make sure there is a salt dispenser.
Look inside the dishwasher to see if you approve of the layout of dishes. If wash your cooking pots in the dishwasher, having loads of plate-holding-prongs is not going to be helpful. Large pots will not be able to fit. Alternatively, if you do your pots by hand and always seem to be filling the dishwasher with plates it will be a nuisance if the plate racks inside are not high enough to hold your plates securely.
Cutlery racks have begun to evolve also. Some people prefer to have a top shelf (in addition the the two in a standard dishwasher) to lay the cutlery flat and ensure it all gets a good clean. Do you prefer the standard lift-out cutlery basket where cutlery can be thrown in without too much thought?
You may also want to consider safety, is there a child lock, if you have children. Is the dishwasher easy to keep clean, filters can block if they arent cleaned regularly, therefore reducing the efficiency of the dishwasher. How adjustable are the racks in the dishwasher? will you be able to make room for large pots and pans if need be.