Do not play them slow. Playing the pocket aces slowly will give a chance to too many players to see the flop with some kind of hands like 9 10, 7 8 and ect. The flop for these players can be very favourable and they will use the opportunity to take your all chips, because you will completely sure that on flop your aces are still the best, but they may have trips or straight draws, flush draws which will not let them to fold the hand anyway.
The best way to play pocket aces is to make a solid raise. If a person before you have made a good raise I will go all-in for sure, because knowing that he had something good,too and will call the hand in 80% of the cases. Making a solid raise with pocket aces, you will deduct the amount of vulnerable hands out and will know that if somebody calls you he is having something not so bad and closer to a good hand.
For sure you can play your aces all-in if your stack is not the necessary in the current time of the tournament and you are struggling in that moment. That is the best way to come back on the winning way.