Carl from The Minor Chord has info about taking care of your bridge

Hey acoustic players,

Check your bridge each time you change your strings. If you think it’s starting to lift away from the top of the guitar, try to slide a piece of paper into the crack. If the crack is wide enough for the paper to slide in (like in the photo), you have a problem. That bridge could let loose at any moment – and with the tension of six steel strings tuned up to pitch, the result would not be pretty. Back off your string tension right away and consider your options. Bridges can be pried off and reattached, but the work should be done by an expert luthier. Manufacturers of quality guitars (think Martin, Taylor, etc.) may cover the work under warranty, but reattaching a bridge on a less expensive guitar is usually not worth the cost.