Resin 3D prints are definitely going to fail if they are not supported. The failed sections may even get stuck to the resin vat and it becomes nearly impossible to remove it without damage.
You must use isopropyl alcohol in order to remove the resin prints. You can also clean the vat for the next print. Below are the steps that you are required to follow in order to remove failed resin prints from your 3D printer.
You must wear latex gloves and wear a respirator that is very tight-fitted. If you end up ingesting this resin by mistake, then it can be really harmful for you.
Unscrew the thumbscrews which you can see on the left or right sides of your vat. When they get loose, remove it by holding on to the plastic sides. After that, the vat is going to slide and come out of the printer.
In order to do it in a clean way, you must angle the vat so the liquid goes to the corner of your vat and then overflows. some vats actually have an accurate funnel design. For this, you must check your vat in case.
Your container must be covered with a lid, which you can easily tighten. If your pour something into your container for long-term storage. Please ensure that the container is either kept in a dark place or is black in color. The resin will get ruined if it gets exposed to light.
You are required to use at least 90% isopropyl alcohol, pour it into your vat so it covers the failed prints. Now, allow it to sit for a few minutes. After that use your hands to massage the prints from the end of the vat.
The thin sheet that is at the end of the vat is delicate. Therefore, you must not use any sharp objects. In case the prints don't detach from the end of the vat, then you need to put pressure on the underside of the vat where you see the failed prints, this will enable you to remove the failed print.
The cleaning can easily be done using an IPA and cloth. Pour it on your Vat and then use the cloth to wipe a resin, which is left in your vat. Once you are done cleaning it, check if there is a large amount of IPA left in your vat, then take one more container and pour it into your container.
Wait for IPA to evaporate completely and then keep the vat in your printer just the way you removed it and then finally tighten the screws.