why do phone screens feel so much dirtier in the summer

like seriously, i wipe mine down every morning and by noon its all gross again is it just sweat? or are we all secretly touching our screens more in the heat? i swear its worse this year too, maybe im imagining it but i feel like my screen is constantly smudged no matter what. i even tried one of those 'anti-fingerprint' screen protectors and yeah right, that was a joke maybe its the sunscreen?? idk man its annoying. also slightly paranoid now about how many times ive touched my face and then my phone today. probably too many.