Help for toned arms


Hi everyone,

I've done few FB programs since April this year mainly to loose fat in my tummy and to tone my arms. I know we can't spot reduce. I have lost few inches from my tummy area but my arms have become way more flabby. I don't know what I'm doing wrong. I love strength training and have completed FB Strong twice in last few months. The heaviest I lift right now is 15 lbs to 18lbs for a couple of strength training exercises. I'm currently doing FB Abs 2. I bought Flex recently but Im wondering how efficient it would be to tone my arms. Should I lift heavier? Any suggestions are greatly appreciated.