Might try one of these, if your budget allows..
AquaPurr eC - The Cat Water Fountain You Never Clean https://www.amazon.com/dp/B07D1RRSM8/ref=cm_sw_r_cp_api_i_5JlFEb57XMRMN
It's like a tiny motion-activated faucet just for them. I have one and it works quite well.
Depending on your budget/level of desperation, you could get one of these:
AquaPurr eC - The Cat Water Fountain You Never Clean https://www.amazon.com/dp/B07D1RRSM8/ref=cm_sw_r_cp_api_i_5JlFEb57XMRMN
It's basically a tiny motion-sensor faucet just for them. I have one and two of our cats love it. Also gives me peace of mind that they'll never be out of water if I'm not around.