To use a meat Taylor 5937N Classic Roast Yeast Thermometer properly, insert into thickest part of meat making sure that frozen meat has been entirely thawed. To prevent loss of juice, do not remove the Taylor 5937N Classic Roast Yeast Thermometer until the roast has settled. In the event the thermometer breaks, the black fluid inside is nontoxic and will not effect the meat's flavor or safety in any way. Simply cut out the discolored section.