don't over spray the starch- a little bit goes a long way- ironing board covers are washable- take it off & wash it when starch builds up-
cover your ironing board cover with freezer paper- pressed into place- you can peel it off & toss it when it becomes soiled & just put a new piece on. (i do this when i'm using alot of fusables-working on a big applique project-works great)