If the board is wetish you can't keep slow playing them and give the chance to your opponent see free cards and improve their combination. AA is the best
starting hand at poker , that doesn't mean that has 100% winning
equity post flop. Many players have trouble to understand this.
I also never open limp with AA , that's also a leak , by open limping or flatting you invite more opponents to see a ''cheap'' flop. You want to play your AA heads up.