As usual ETH network is congested this is why if you are really in a hurry then better to set out higher gas. 50+ gwei do work for me and confirmation was fast.If you are not in a hurry then you can set lower gas but should not go below 25 gwei because if you do set lower then expect there would really be a long wait.You cant do nothing but to paid up some amounts if you do really like fast confirmations.