I got waves in 1 wash n style | hOw?

I've been brushing for 8 days and this morning I decided to do a wash n style. I thought it wouldn't make much of a difference cus I couldn't even see ripples yet. So I did the wash n style, and when I took my durag off, I was surprised. I could see legit waves, like not even ripples they were connected, not very deep and there were some forks. BUT, it was waves. Wow just wow. This might be happening because I had waves 3 months ago, I had those waves for almost a year. They messed up because I grew my hair out, stopped brushing my hair and used sponges. So its probably not because of this. After all that was 3 months ago. So guys tell me what you think. The last time i had waves it took me about a month to see the amount of progress I have just seen today.