The fire and rescue service says the unknown substance found on Garwick Beach on Boxing Day was most likely palm oil.
Firefighters say though the risk to humans is low, if dogs eat it, it can be serious.
People are still being asked to avoid touching or removing the yellowy material from the beach south of Laxey.
Meanwhile the coastguard is warning people to keep dogs away from the area until the tide has washed leftover pieces away.
Roads now closed for evening qualifying
Roads are now closed around the TT course.
All roads open except the Mountain
All roads on the TT course are now open, with the exception of the Mountain Road.
Afternoon qualifying disrupted by 'non-racing medical emergency'
TT organisers say bikes have been stopped entering the course due to a 'non-racing medical emergency'.
Check your vehicle's size, says Steam Packet
The Steam Packet is urging travellers to make sure they give the right vehicle measurements when booking.
Property developer submits plans for historic hotel
An Island property developer says it's submitted more planning applications for the Castle Mona in Douglas.
New payment option to spread prescription costs
A new monthly payment option means patients can now spread the cost of annual prescriptions.
Chance to celebrate fictional TT winner's victory for movie!
Wildly enthusiastic crowds are needed at the TT grandstand to celebrate a fictional TT winner tomorrow!
Photos show Bushy's TT Village ready to open tomorrow!
A firm fan favourite of the TT will throw open its doors tomorrow!
