Clarifying shampoo ...?

My boyfriend uses clarifying shampoo for his mane-like hair. I know it removes dirt, oils, styling product buildup and fades hair dye. Well I used it about an hour ago because I dyed my hair, didn't turn out right so I'm gonna bleach it in about a week. I wanted to use it to fade out as much of the dye as possible before I bleach. Well it got my hair clean, but it made it feel kinda gummy ... like it was a little bit stretchy (it already is that way, but it felt more so when it was wet this time) and I have like dandruff right now. I NEVER get dandruff, but my scalp is kinda flaky right now. Why did it do this? Should I keep using it to remove the dye, or is it a bad idea?