What's wrong with the white waist and birds dilute

The white waist birds are diluted because the diet and drinking water are unhygienic, or it may be because it is not clean in the cage.If it is the former, what needs to be done is to replace food and drinking water. Usually, the food and drinking water remaining in the food and water tanks are usually poured off every morning to avoid its deterioration.If it is the latter, it needs to be cleaned regularly to keep the cage clean, which can reduce the breeding of bacteria and avoid birds' illness.