深夜恐怖，岳父老家灶台出现奇怪液体。

[img]https://img.nga.178.com/attachments/mon_202007/06/-7Q5-fop1K1kT3cSlc-sg.jpg.medium.jpg[/img][img]https://img.nga.178.com/attachments/mon_202007/06/-7Q5-g751K1xT3cSlc-sg.jpg.medium.jpg[/img][img]https://img.nga.178.com/attachments/mon_202007/06/-7Q5-fufiK1pT3cSsg-lc.jpg.medium.jpg[/img][img]https://img.nga.178.com/attachments/mon_202007/06/-7Q5-i0lwK22T3cSlc-sg.jpg.medium.jpg[/img]
灶台底下瓷砖，正常颜色标记红处。乳白色已经清理过一次了。半年后还是这样？考虑是藻类污染？