Sometimes fatliquors used during the tanning process or natural animal fat within the leather can migrate to the surface leaving a white hazy film, this is known as spew, and can often be mistaken as mould.

Spew can be identified by heating the leather with a hairdryer. When warmed up the spew will dissolve, however it reappears as it cools.

The film can be wiped away or cleaned off with a normal cleaner but it will always reappear.

The Spew Remover extracts the spew from the leather and penetrates into the leather to prevent the spew recurring.