ONE: All babies do Elvis.
and TWO: When you find on a mop style that you LOVE, buy as many replacement heads as you can afford. Contact the company and ask them to send you a few gross if you have the dough. Pay for it with the third-born child you're certain you won't have if you're running short. Because as sure as all babies do Elvis, those feckin' mop designers will discontinue their product within two years, forcing you to buy another mop handle and start again.
Thankyouverymuch, Jerkwads. Another perfectly good mop handle - better, in fact, because it was the only mop I have ever LOVED - bites the dust.