Pollination

So I just got my greenhouse completed over winter. I have tons of starts in there now waiting for the weather to cooperate to set outside. I have some strawberries in there that I have been pollinating with a qtip. My question is how often do I need to do that? Just once for each flower? Multiple times a day? My outside patch does fine without my help but I have never had to worry about any of them inside

Similar question, currently my greenhouse is the only "ground squirrel proof zone" so I'm using it for all cucurbits, which are going to need hand pollination.  Any advise is appreciated.