Chronic Delta Faucet Leak
Two handle Delta bathroom faucet (25901LF) leaks chronically. I have replaced the stem assembly twice but the spout leak returns within a week or so. I can temporarily stop it by opening and closing the faucet but it always returns. The seat against which the stem assembly rests seems smooth and I've flushed the whole thing several times. While it isn't a world class crisis, I'm getting tired to replacing stem assemblies. Any ideas??