The smell from the hot glue is likely caused by volatile organic compounds (VOCs) that are emitted as the glue dries. While some VOCs can be harmful to inhale, the levels in hot glue are typically not high enough to cause serious health problems. However, if the smell is bothering you or causing allergies, it may be best to remove the blanket from your bed and allow it to air out for a few days in a well-ventilated area.
If you continue to experience symptoms after the blanket has aired out, you may want to consider removing it from your home and disposing of it properly. You could also try washing the blanket to remove any remaining glue or VOCs, but be aware that this may not completely eliminate the odor.
It's important to be cautious when working with hot glue and other adhesives, as some of the chemicals used in their manufacture can be harmful if inhaled. Be sure to use them in a well-ventilated area and avoid inhaling the fumes. If you experience any adverse reactions to hot glue or other adhesives, it's best to seek medical attention right away.
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