Reasons for invalidating
That kind of liquid that does not spread around by itself will not invalidate wudu even if it is wiped.Letting blood through cupping and using leeches invalidate wudu.If the total amount of what is vomited amounts a mouthful, it invalidates wudu even if it is vomited in small amounts. If saliva is more than blood, wudu is not invalidated.5 – If blood equaling to saliva or more than saliva comes out of the mouth, wudu is invalidated. If traces of blood are seen when one bites a quince, an apple, etc, wudu is not invalidated. Therefore, it invalidates wudu if someone laughs while praying.Until recently, such agreements were considered difficult to revoke.
12 – Getting drunk by taking alcohol or drugs invalidates wudu.
The wetness caused by eczema and the rashes between the fingers do not invalidate wudu.