1) Clean the targeted surface with a clean dry
cloth and then use wet wipe to remove any left over dirt.
2) Please stick the thermometer on targeted surface
and press it firmly. Please make sure the surface is not completely dry,
otherwise the suction cup may not stick strong. Do Not try to remove the thermometer
from the surface immediately after you have applied it as it will weaken the
stickiness.
If the suction cup does not stick. Please wipe the
glass surface clean. Wash the suction cup with water. Or soak the suction cup
in boiling water, or apply a little oil and then suck it, it will be absolutely
OK. This method is very effective. All suction cup products will have this
situation to a greater or lesser extent.