After like 37 years, suddenly we have a rotten egg odor in our hot water (water source is a well serving several families; neighbors are OK). Coincidentally, we put in a new Whirlpool water heater about 6 months ago. So, after contacting Whirlpool, I put in a new standard anode tube. However, the smell came back in about 1 week. So, after doing a little research, I purchased an upgrade anode tube and installed it after chlorinating the water heater. So, we're keeping our fingers crossed. Meanwhile, one source suggested installing a chlorine drip in the hot water heater input. Has anyone done this and have any suggestions or other experience along this line? Thanks.