Hello there pf76. I am sorry for the trouble this has caused and thank you for reaching out. I am sorry to say that the DJI Spark is not waterproof and since your DJI Spark got wet and now you are having this issue. I would recommend for you to contact our DJI Support Team at https://www.dji.com/support?site=brandsite&from=nav for further assistance. We will do our best to help you and give out the best resolution for the said issue. Again, I am sorry and thank you.
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DJI team