Just thought I'd toss this up for discussion, has anyone noticed a drop in quality in regards to recent (+/- 6-12months) D'addario strings? I've been a long-time user, and really like D'addario due to the plastic air-tight bags. I like to buy my strings in relative bulk (15-20 packs at a time), and tend to go for string runs every 3-4 months or so. I actually like Ernie Ball strings a little better, but stick to D'addario due to the long shelf-life the plastic bags offer. Recently however, I've noticed that the D'addarios I put on start to show wear (discolouration) within the first 2-3 hours of playing, and even begin to oxidize/'rust' within 2-3 days. In the past, this only used to happen after about a week. I've noticed this for the last 5-6 packs I've used, and wanted to check if it's just me? For the record, I live in Singapore where it's pretty hot and wet, humidity is in the 70-80% region all year long. I always wipe down my strings after playing. Anyone else have the same experience?