anytime you remove your contacts from the solution you should change it or if you wore your cls one day then the next day you don't want to wear them you should still replace it the solution the next day. The cls should be soaking at least in clean solution. Since you don't wear them every day have you thought about daily cls? you should look into it if you can get dailies in your prescription.
Daily Jumble 5/15/15:Clue: He wanted to change the channel, but he didn't have a...Answer: REMOTE CHANCE (often, eagle, hiccup, trauma)
Change your ferrets water at least once daily
One solution found in many homes is contact lens solution, which cleans and refreshes contact lenses for another day of use and keeps them from drying out or infecting the wearer's eye.
Iodine changes color from brown to blue-black when it comes into contact with starch. This chemical reaction is often used in laboratory experiments to test for the presence of starch in a solution.
Bleach water or sanitizing solution should be prepared daily for effective cleaning and disinfection.
Contact Metamorphism: When magma comes in contact with other rocks it will heat them and change them into new rocks. This often happens around an igneous intrusion.
Substances that change color depending on the pH of the solution they are in are called pH indicators. These indicators often undergo reversible color changes that are used to determine the acidity or alkalinity of a solution.
Proclear lenses, made by CooperVision, are one month contact lenses, and should never be used to sleep in.
You will need to contact Colt. Prices change often.
It shouldn't!!! You must change it more often! Daily!!! would you like your food to be slimey???
Unfortunately they will try to contact you anytime, anywhere - not sure of your local laws you should check them out. They usually try once daily but will also try your work, family, friends etc.
Desert biomes often have the greatest daily temperature change, with temperatures that can swing significantly between hot during the day and cold at night due to the lack of vegetation to retain heat.