Brother GTX pro Instruction Manual page 131

Maintenance of pretreatment roller
If you continue using the pretreatment roller under a state in which any fuzziness, yarn waste, dust, etc. remain attached
to its surface, you may not provide a uniform coating.
In such case, use a toothbrush or the like to brush off such fuzziness to remove it from the surface.
<CAUTION>

Be sure to wear a pair of plastic gloves and protective glasses during the work operation.

For information on handling of the pretreatment, see the Material Safety Data Sheet issued by us.
http://sds.brother.co.jp/sdsapp/index.html
<NOTE>

After the pretreatment roller is used, put it in a plastic bag or the like hermetically to prevent it from drying up, and keep it in a flat
place in an upright position.
Also, when it remains unused for two weeks or longer, wash it well with running water, and let it dry in a shaded area before using
it again.
Toothbrush, etc.
Pretreatment roller
131
Basic printing procedures
X0095