If the party has been wiping a bit I'll generally say "If anyone needs tips, I'm happy to help. I'm okay if we keep going blind, too." More often than not, someone asks me about something they aren't sure of and I explain. Sometimes they say that they never understood X because no one would explain it. Sometimes I don't get any response but that's to be expected. I don't usually get people being salty because I only tell them if they say they want help for something. Asking first means the power is in their hands to say yes or no and when there's a choice they're actively able to participate in (as opposed to unsolicited advice) I've found people are a lot more receptive.