Birds have been found with the substance congealed on their feathers, reducing their waterproof coating and ability to stay warm and afloat at sea.

BBC: Seabird deaths substance 'identified as oil substance'

She said the birds have been found with the substance congealed on their feathers, which reduces their waterproof coating and ability to stay warm and afloat at sea.

BBC: Seabird deaths: Pollution causes 'burning' to seabirds

The keyboard has a waterproof rubber coating and the case is sealed to prevent dust from encroaching.

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