Well, it appears that somehow our supplier has mixed in a few wrong tips with the correct ones. Let's first talk about how you can tell.
If you have the correct tip, all the reagents will come out of the bottle in such a way that you can count each drop. Now you could get a little careless and apply too much pressure to the bottle but, generally, they should stay seperate and countable.
If you have the wrong tip, it is incredibly difficult to contol the drop rate. The drops tend to be small and almost "shoot" out of the bottle....it's very difficult to make the drops uniform. They even seem to come out of the tip at an odd angle sometimes.
The biggest giveaway that you have the wrong tip is that your other reagents will be obviously easier to control. So if you have 5 that are reasonably consistent and one that gives you a fit, you obviously have one bad tip.
Here's a temporary solution. Simply remove one of the good tips from any of the other reagents by bending it over at a 90 degree angle to vertical....it'll snap right out. Now rinse that dropper tip thoroughly in tap water, inside and out and replace the offending tip with this newly rinsed one. (all the reagents are water soluble)
This will allow you to perform any test you may have to do, until we can get you your new dropper tips.
Here's the permanent solution, after you have determined you have a bid tip or tips, please send an email to Tftestkits@hughes.net
and tell me how many tips you need. Please include your MAILING address as these will go out first class mail. We'll get them right out to you the same day we get your email if we get it by 2:00pm.
The tips are virtually identical (the hole is smaller on the wrong ones but it's difficult to tell....use the performance above as the determining factor to decide if you have a bad one) but we know what to look for here so we'll be examining them carefully to insure that everyone's is correct from here.
Sorry for the inconvenience this has caused you but let me know and we'll get it corrected.