I am opening my vinyl inground pool for the 1st time since I bought the house (6 yrs.). I called a pool co. & they told me they would drain the pool, while putting a vacuum behind the liner to keep it against the the wall. Then they would power wash the walls with algacide & water as the walls & water are really black & dirty.

Is this an accepted method, to power wash a vinyl liner? The co. told me there is a 50/50 chance of the liner holding up, & made me sign a disclosure. Are they just trying to get me to put in a new liner?

Please help.