As you can see; oil build up, make up, creams, dirt and everything else builds up on the natural lash forming a barrier between that and the extension, adhesive can't magically get rid of these, this is why you should cleanse daily to ensure there's no barriers for good retention.
This an old saying, and now a myth- eyelash glue has completely changed since eyelash extensions originated and times have changed: a lot of techs actually offer a post lash cleanse.
The reasons some artists say not to get them wet is because they stick together and lose their fluffiness, if they are cleaned, brushed and dried after getting wet then your lashes will stay on top.
Now, this is such a conflicted argument and we can understand why some lash artists still recommend not to get them wet, for their own policies, to ensure retention stays 100 but you don't actually need to wait!
Using a superbonder is also a good way to enable them to get wet after the service.
Red eyes are usually:
Chemical burn from the glue: which happens if the eyes are flickering, they opened them too soon, the eyes aren't fully closed and if the adhesive fumes are strong, taping up the lashes.
The pad/tape is rubbing: this can be avoided by asking the client throughout if it feels uncomfortable, try using one or the other, or both if you don't already.
There is a lash placed on the lid: We have seen it happen a lot, a lash is glued to the inside of the eyelid which is scratching on the eye.
Conjunctivitis/Blepharitis: we are not doctors, but these can be an indicator of these.
In some cases, a reaction.
We see it happening too often, people saying their clients are having a reaction when it is chemical burn or the tape rubbing. Indicators of a reaction to the adhesive are usually:
Ask your clients to send photos and if they have time, to come in and evaluate! If they are having a reaction to the glue, do not use remover to take them off, this can irritate further! Banana peel the lashes off.
Another mistake made.
Some of us have 5 layers of lashes, some have 1 or 2. Some of us have long, thick and healthy lashes, some have short, brittle and broken lashes.
You cannot, and should never offer a service before seeing their natural set. If their lashes are damaged, we always recommend waiting a few weeks for another consultation to allow time for them to replenish!
How are you going to do a 15mm cat eye if your clients NL are 5mm? It isn't doable and you should always have your clients best interests at the front of your service.
Always check manufacturer's guidelines.
Some techs keep their unopened glue in the fridge so it stays at a regulated temperature before opening, but once the adhesive is opened, it is exposed to oxygen and needs to be stored in an upright, sealed container.
Putting your glue in the fridge when it has been open will expose the adhesive to too much fluctuation in temperature which can cause it to go bad quick. Always keep your open glue on its own in a storage container.