Chances are the melamine has already off-gassed the majority of whatever chemicals it started with butstranger things have been known to happen.
- Have you moved the bed recently so that the headboardis close to a wall heater or heat register which may be activating the glues in the melamine?
- Have you recently applied a salve or lotion to your daughter's skin that may have gotten on the headboard andmay be co-producing the odor?
Regardless, if you have the financial resources, changing out the headboard for solid wood would be a wise investment in your family's health.
Here are a few website to browse for environmentally oriented kid furniture:
If you do not find what you need at one of the websites above then consider looking for manufacturersand retailers on the Sustainable Furnishings Council's website.
For more information:
Read "How should I deal with off-gassing from a Melamine desk?" a Q&A answered by Joel Hirshberg.