All but the GF daily survey should credit within 1-2 hours. The GF won't credit until Monday and it's safe to clear cookies with this one because they track by user ID and not cookies....with the other one, if it hasn't credited by the second hour, you probably won't get that credit, so it would be safe to clear. I clear cookies first thing in the morning before starting anything and then again only between the SSI and SSI2. I will usually clear before I place a shopping order too and wait for that confirmation to come before clearing again if I'm ordering from multiple sites. HTH