I tend to agree with Harpz_31, I recheck my rigs and baits every few hours. I normally fish combi rigs so tangling isn't the problem but the amount of times I've reeled in to find a large 'blob' of weed on the hook totally ruining the presentaion and hooking potential always plays on my mind and my local lake is pretty weed free. I used to tie on my cork ball pop ups with dental floss but the amount of times I reeled in a bare hook was getting beyond a joke so gone back to shop bought pop ups and either use a bait screw or pull the floss through and also double secure it with a bait stop. Probably a bit paranoid but rather be safe then sorry.