Use the recommended gas price from here https://etherscan.io/gastracker
Do not modify the gas limit.
When the contract is emptied
The contract will need top up and it needs the CEO's attention. Please stay tuned. I suggest setting up an email notification when the contract receives additional funds. https://etherscan.io/address/0x08a52b2055ad666240a9491a1dd375b4b34104a9