When you get out last year's lights, do you "try" to fix the sets that don't work or just toss them. I've spent several hours trying to get sets from last year to work & they just WON'T!!! I feel I've wasted all that time (still don't have my C'mas cards planned) and ended up w/the same result. But, I feel I HAVE to try. What do y'all do?