I accidently spilt lemonade on my Macbook Air keyboard. As it is part of a student-school program I cannot fix it or pay for someone not advised by the school to fix it. When I tipped over my glass, it spilt over the lower half of my keyboard. I immediately turned it off and tipped it upside down, before patting it down with paper towel. Even though the battery or inner hardware of my laptop are still working, some of the keys are sticky when I press down on them (space bar, N, V, F, G and H). The keys are backlit and I'm not sure the school warranty covers spills. Is there any way I can fix this safely? Any help is massively appreciated. Thanks.