That’s from using oatmeal! Def don’t do that again! Seems like it would be too thick and goopy and next to impossible to strain all the solids out! Prob should strain thru coffee filter or something so may wanna add to grocery list! That or them paint strainer funnels! They just make it super simple to get them pieces out! Just insert into a large kitchen funnel and slowly pour thru it! That way u can use free hand to stir the stuff in the funnel so it doesn’t plug shut! Once it starts to just dump the contents into sink and reinsert funnel!