https://www.bibra-information.co.uk/downloads/toxicity-profile-for-formamide-1990/:
Repeated oral administration to rats caused tissue changes at a number of sites including the gastro-intestinal tract,
spleen, testes and blood. Multiple dermal or inhalation exposures induced blood effects, changes in organ weights and testes
damage in rats. Foetal malformations and foetotoxicity were induced when laboratory animals were treated by the oral,
dermal and injection routes during pregnancy. Chromosome damage was reported in rats treated with formamide but no
evidence of mutagenicity was seen in Ames bacterial tests
Так как я не только идиот, но и профан в химии, я не могу оценить риск того, сколько этой субстанции могло остаться на поверности моющей камеры и внутри слива и насоса машинки, и соотвественно, сколько еще вермени и насколько он может вредить здоровью, в особенности детскому.