water or solution?

[primus67]

adding solution is really only needed avery four or five times you wet the foam, you can use distilled water otherwise.

therein lies my dilemna. the madelaine soultion says to use it every time. if i add distilled water, will this dilute the effects of the soution when i DO use it? i assume it must not be a 50/50 as too much pg will ruin the humidifier. i'm assuming it's mostly distilled water in their solution. it also came with instructions saying NOT to use a 50/50 mixture with this humidifier.