For how long should o keef my saran wrap on my new tattoo ?

my tattoo artist said that i have to chane the aran wrap every 3 hours for 3 days ! bu i heard ppl say that it should be only for the 24 hours .. i got it today afternoon .. and i already changed it twice ... so do i sleep with it till the morning ? then wt ?? follow his advice ?
Update: can i use for bed time only cuz i dont want to stick to my sheets !
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