Yeah, the ilex paste can become a goopy, sticky mess, which is only tolerable due to the level of discomfort, pain and desperation, however, there's a knack to its use.
If butt burn is severe resulting in skin errosion, then the ilex paste must be heavily applied, kinda smeared over the affected area, best applied just before bed, whilst also doubling up on Imodium intake. The ilex must remain until it begins to peel away from the skin by its self, although in the meantime, keep reapplying after every BM; it's well worth the inconvenience for a couple of days.
If need be, the ilex paste is easily removed by use of wet wipes.
To apply the ilex as a preventative measure, only a very small pea size amount need be applied to the affected area after every BM.